The days in school were intense. Sally seriously profiled herself as my girlfriend, and she and Liz had become Best Female Friends. No one had any suspicions about us. Perfect.

On Wednesday Sally and I had an hour without classes. Liz, other year, was stuck in a classroom, so Sally and I walked around, hand in hand, until she whispered: "Care for a fuck in the janitor's broom closet?"

"Of course, " I said. My cock wasn't bursting, because Liz and I had gotten it off every night since the weekend, but why turn down an offer from my girlfriend. We knew the janitor was not around today and he always left the closet unlocked. We'd have to figure something out about that, because getting caught would not look good. Okay, maybe it would look good, depending on who did the looking.

The broom closet wasn't even full of stuff. There was plenty of space for us, and we found the key stuck on the inside of the door, which was a streak of luck we couldn't even have hoped for. With the door secured, Sally and I dropped out pants and first hugged and kissed. I squeezed her butt and we did a little tongue dance, as my cock jumped up and pressed between her legs.

"Want to lick me first?" Sally asked, sounding a bit hoarse.

I didn't even answer then. I knelt down, put my hands on her hips and pressed my mouth against her soft mound, sliding my tongue over it, between her lips and teasing her clit. She pressed a hand over her mouth to muffle her moaning, and pushed her hips against me to get the full effect.

"I want you, " she suddenly said, and turned over, bending down over a small table. I gave her slit a final lick, then got up and targeted her pussy. Then there was some noise in the hall outside the closet. With only the head of my cock inside her, we waited. Two teachers were there, talking about something.

Teachers weren't interested in broom closets, so I slowly pushed deeper into Sally, who again muffled her moaning as I slow-fucked her.

The teachers moved on and there was silence again.

"Yes, John, fuck me, " Sally whispered. "I'm all yours."

The difference between her and Liz's pussy was amazing. I felt it so well after not having been inside her for a while, and it made me horny, so I fucked her a bit harder.

"My mouth, " Sally moaned.

"What?"

"Come in my mouth. Like you did with Liz."

As I was close to getting off, I pulled out of her and grabbed my phone, while Sally knelt down and opened her mouth wide. She started jerking me off while I took some pictures of her, and then I shot my load. Not as much as Liz had gotten, because I had fucked my sister the night before, but it looked fabulous, and she actually posed for a few good pictures. Sally closed her mouth and swallowed. After that I took another picture of her mouth, now empty again, with a few slivers of my cum drooping from her chin.

"That is so fucking hot, " I whispered as she licked my cock clean. I took a few more pictures.

She got up, pulling up her jeans. "I wanted this after seeing that picture. And mom wants it too."

I made sure the pictures went to our secret app and pulled up my pants too. With my handkerchief I wiped my cum from her chin. She grinned.

We listened at the door. No one. We unlocked it, slipped out, and strolled down the corridor as if nothing had happened. As there was still some time, we went outside, sat on a bench, and talked a bit about everything that had happened lately. It got me hard again, and Sally told me that her pussy hadn't stopped being soggy since then.

"And mom's pussy always sloshing too, " she added with a wink. "She already regrets me coming over to you for the weekend."

*

The next school day was totally uneventful, down to boring. At home, Liz and I kept having sex as often as we could, and so did Sally and Dinah. We kept each other up to date with pictures, which was the best we could do for now.

It was Friday when Sally came up to Liz and me. She looked worried. We both wrapped an arm around her and asked what the matter was.

"Nancy is, " she said. Of course Liz knew that Sally and I had fucked in the janitor's closet, and she loved the story. Sally told us that Nancy, one of Liz's classmates, had heard us in there, and now she demanded to have sex in school too.

"Jesus, that's not what we need, " I said.

"Don't say that too quickly, brother, " said Liz. "We're all out of class for lunch at the same time. Maybe we can arrange something."

"We?" Sally was as surprised as I was.

Liz nodded and told us she wanted to see Nancy in the nude. "I want to be part of that, and I want our girlfriend there too. Make it a school fuck."

I argued that the janitor's closet wasn't big enough for four people.

Liz nodded, and said she knew a space in the basement, where some school supplies were kept. "I'll see Nancy in the next class. I'll talk to her." She winked, kissed Sally and then me, and walked off.

Sally huffed. "She didn't even ask me if I want to share my boyfriend." She looked at me and grinned, because she was already doing that, with my sister and her mom.

I slapped her butt, which made a few other whistle, and we went to the next class.

*

Lunch break came soon. Liz had texted me where she and Nancy would wait for us; halfway down the stairs into the basement, where no one would see them.

Sally and I made our way there and joined them. Nancy's big eyes looked at me. She was a chubby lady with a friendly demeanor and big boobs. "You are here, " she said, her voice faltering for excitement.

"Of course, " Liz said. "Let's go, we're wasting time." She led the way and mere minutes later we were in the storage room.

We all took our clothes off. It surprised me that Nancy was in an actual hurry and she looked hungrily at my cock.

"Sally sucks first, being the girlfriend, " Liz said.

Sally quickly got down on her knees and took my cock in her mouth. Nancy knelt down next to her and looked, as in awe.

"Nancy agreed to some pictures as long as I share them with her, " Liz announced, phone already in hand.

"Your turn, " Sally said, pointing my cock at Nancy's mouth. Nancy opened her mouth wide and took me in. Deep. It felt as if my cock went down her throat.

Liz took pictures as Sally licked Nancy's cheek as the chubby woman sucked me hard for a while. When she finally let go, she gasped for breath.

"I love this, " Nancy said. "Now the fucking?"

Liz had already found a desk that Nancy could lie down on, so she did and she spread her legs wide. She'd shaved her pussy. I slid a finger inside her, making her gasp. Sally slid a finger in too, making Nancy look up. Then Liz added a finger and made a few pictures.

"Oh my god I'm finger fucked by three people, " Nancy sighed as she shuddered for pleasure. Sally bent over and licked Nancy's pussy, slobbering all over it.

"It's time, " I said as I pulled my finger out.

"Keep the finger there, Sally, " Liz said as she did that too.

It was a bit of a surpride but I got in position and slowly pushed my cock into Nancy's wet and waiting hole. The two fingers pressed against me and into her pussy. It was wild. Liz took pictures.

Nancy moaned as Sally moved her attention from the wet slit to the big, soft nipples while squeezing the big boobs like a professional masseuse. Liz took more pictures, of my cock going into Nancy, of Sally sucking the nipples and pulling the boob up as far as she could.

It didn't take long for Nancy to get off once I started rubbing between her pussy lips. She was wet and horny, and she shook as her orgasm took over.

We watched her squirm as the waves went through her, and we loved seeing it.

"Better than a broom closet, " Sally said as she turned her ass at me. "Next, please."

With pleasure I shoved into her, her pussy welcoming my cock like a long lost friend. It was lovely pounding into her, and Nancy sat up, watching us.

"This is so fucking hot, " she said, rubbing her pussy again. Liz took a few more pictures. She looked at Liz. "Thanks for asking me." She got up and started dressing again, explaining she had some things to do before the next class.

"Remember, not a word, " Liz said, holding up her phone.

"Not a word. Promise." Nancy crossed her heart. "Don't forget to send me those pics, okay?" She watched me fucking Sally for a few more moments, then sighed and left.

"Now me, " Liz demanded as she lay on the desk. "I didn't want her to see my brother fucking me."

I understood. "You okay with the switch, girlfriend?" I asked Sally.

"No, but do it anyway, " she replied. "It's so cool to see you two going at it."

I pulled out of her and watched her juice trickle out of her slit. I rubbed a hand over it, making her gasp and squeal. Then I turned to Liz and slapped my cock inside her soggy pussy.

We didn't have much time now, because the last classes were almost waiting for us, so all three of us felt like we'd been cheated out of orgasms, but we were certain to make that up later that day.

*

The last hours went by faster than I'd expected, and when Liz, Sally and I walked to our car, Nancy walked up to us to thank us for the nice lunch break.

"I got the pictures, " she said quietly, so no one else would hear, "and I'm going to get myself off on them this evening."

We told her to have fun, got into the car and drove off. On the way home we already planned ways to be together without our parents getting suspicious. Sally would sleep in Liz's room, that had already been arranged as the house lacked a spare bedroom. All beds in the house were big doubles, just in case, so that was easy. A double bed would hold all three of us too.

Mom and dad greeted Sally and treated her like the guest of honor, asking her a million questions, and everything went super smoothly. Our parents were delighted with Sally, who was the perfect girlfriend and potential daughter in law. That comment from mom made all of us look up, because we were in it for the sex. Not that we told her that, of course.

After dinner we sat in the garden, Sally and me holding hands a lot. I could tell that Liz wasn't exactly thrilled with that. She wanted us to hold hands too, but here that would be too awkward. My sister teased us by sometimes touching her breasts, stroking one of her nipples, and once even pressing a hand between her legs.

Mom and dad didn't notice. They were all taken in by Sally, who did look ultimately cute with her orange and yellow sunshine skirt and a dark red top. She'd changed into that after we'd gotten home; it was too warm for 'decent' school clothes and there was no need for them.

I noticed how dad kept staring at Sally's nipples that poked throuhh the top. If only he knew.

We were almost about to go to bed when Sally got a text from her mother. "Oh." She looked at me and Liz. "Mom asks if we can be over for lunch time. She's doing pancakes." Liz and I immediately knew what that meant: Dinah had been in touch with Amanda, the waitress.

Sally kept her face entirely straight, tucked her phone in her purse and sat in my lap. She wrapped an arm around my neck and looked into my eyes, as her hard, covered nipples hovered close to my face. She then turned to my parents and told them that she loved me very much, and that she hoped it was okay for her to sit on me.

Mom and dad both found that endearing and said they loved seeing her and me that way.

Liz sighed audibly. "I wish I had a boyfriend that I could sit on."

"You will soon, " Sally said. She slipped off my knees and knelt down with my sister, taking one of her hands. "You are a beautiful young lady, Liz. You'll be fine."

"Oh!" Dad looked at Liz. "Do you remember the Bartleys?"

Liz frowned. "I do. Your friends, right?" I also wondered why they suddenly came up.

"They are going out of town for a week and they asked me if I know someone who can check on their house for that time. I thought you might be up for that."

Liz was as surprised as I was. "Alone? That would be boring."

Dad understood.

"But if Sally and John come along, that would be fun, " Liz added, sounding innocent enough. "They do have enough bedrooms, right?"

The Bartleys had a big house, dad said, and he and mom had no problem if the three of us would go house-sitting.

"You're all old and responsible enough. And Liz can cook food, " mom said.

"So can I, " Sally said as she got up and sat in my lap again, 'accidentally' pressing one of her boobs into my face for a moment. It made my cock flare up. Feeling her and smelling her was hot.

Dad said he'd talk to the Bartleys the next day and let us know.

Liz yawned and said she was going to bed. Sally nodded and said she would do so too. I had to stay a bit longer, knowing I'd miss out on some fun, but going together would be too obvious.

Sally kissed mom and dad on the cheek, wishing them goodnight. "I always kiss my mama goodnight too, " she said, and walked along with Liz. At the kitchen door she looked back, saw none of our parents was watching her and Liz, and she pulled down the top, showing me her boobs. Liz quickly leaned over and sucked a nipple. Damn! And then they were inside.

"That is a very nice young lady, John, " mom said. "Kind, calm, and very polite too. Her mother has to be a good person."

"She is, mom. Definitely so." I sat and talked with them for a while longer, telling them how I had met Sally (which they already knew), until it was a safe time to head to bed as well.

*

I knocked on the door to Liz's bedroom and asked, "Are you decent?"

Their laughter from the other side told me enough. The lock clicked and Liz let me in, locking the door again behind me. Both of them were naked. Sally lay sprawled on Liz's bed, her legs wide apart

"Sorry for interrupting you, " I said, getting out of my clothes.

Sally laughed and said I was right on time, because she had gotten off twice already and Liz only once, and she asked if I could be the orgasm equalizer between the two of them. By then Liz had already gotten on the bed again, her beautiful ass pointing at me. She wiggled her hips.

"Come and do it, boyfriend, " she said as she looked back at me.

"And I'll help, " Sally said, sitting up. She took my cock as I got onto the bed and jacked me off a bit. Then she guided my member to Liz and her waiting, wet opening. "I love this. I'm putting a brotherly cock into a sisterly cunt. Isn't that beautiful?"

I pushed a little and entered my sister, who's pussy welcomed my arrival.

Liz sighed. "I can do this all day."

"Half the day. I want the other half, " Sally said. I asked about her mother, to which she said, "Mom can watch." Even Liz had to laugh about that, because we all knew that Dinah would claim her part of the action.

I pounded into my sister for a while until Sally told me to stop. She grabbed my cock and took most of it into her mouth, sucking hard. Then I was allowed to put it back into Liz, who was already complaining about cock theft.

Sally grinned and got down on all fours next to her. "Help yourself, John, " she said.

It was fun fucking both of them in turn. When I was close to coming, I asked what I should do.

Liz threw herself on her back. "All on me. And your other girlfriend can lick me clean while you lick me to an orgasm." That sounded fair to all of us.

Sally jacked me off and all my cum landed on my sister's boobs and belly. Sally first licked my cock head clean and then set herself to the task of cleaning up my sister, while I muff-dived between her legs, my cock still pulsating from the heavy discharge.

Liz didn't need much encouragement to get off. During me fucking her, my balls had slapped against her clit relentlessly, so within a few minutes she was convulsing and moaning as if there was no tomorrow.

Sally got off her and patted me on the shoulder. "Well done, boyfriend." She leaned over and kissed me, tasting Liz's pussy from my lips and tongue. "Nom nom, " she whispered afterwards.

Liz lay there, heavily breathing. "I'm happy and fucked through and fucked up and tired, " she announced. "I want to sleep."

"Me too." Sally lay down on the bed as well.

"I'm going to mess up my bed and sleep here, " I said. "Unless you don't want me to."

"Go and hurry up, " Liz said. "You're not sleeping alone tonight, brother."

I was back within minutes, put the key to my door on her desk and locked the bedroom door. The girls had left room for me between them. As soon as I lay down, Liz switched off the light and they both rolled against me. Boobs, arms and legs were all over me.

"G'night, " Sally whispered. We all wished each other the same.

*

Waking up with my cock in a sleeping girl's mouth was a first. Sally had turned around, her lips around my cock and her pussy against my cheek. I was tempted to kiss that pussy but I was scared Sally would jolt and bite my cock off. I didn't want to risk that.

"Awake?" Liz whispered.

"Yeah."

She got up and took her phone, and took some pictures of Sally with my member in her mouth. Then one with her pussy so close to my face. After that she slowly pulled my cock free, whispering she didn't want anything happening to that. I shared that sentiment.

With the danger averted, I turned my head and pressed my lips against the temptation near my face, sliding my tongue over her slit.

"Hmmm..." she mumbled. "More..." And so I gave her more until she decided it was time to wake up. During that time Liz had started sucking my cock, so that was nice and hard when Sally yawned and opened her eyes. "Oh! I want too..."

Liz and she sucked my cock in turns for a while until we noticed it was around our usual time to get up.

"Not letting you go yet, " Sally said as she straddled me and slammed herself onto my cock. "This is your personal wake up fuck." The feeling was divine. Liz demanded her moment too, which Sally understood. After my sister had taken possession of my cock for some time, I got up, grabbed my clothes and the key, and opened the door to check the hall.

"It's not the first time he leaves my room with a hard-on, " I heard Liz say as I closed the door behind me and hurried into my own room with a big fat grin on my face.