Mom was happy to see us again, and even more happy after hearing we'd had a good time over at Sally's place. Liz immediately dropped that we were invited for a repeat visit 'someday', and added that I had been a good boy in helping her with her homework.

"Sally's mom really appreciated that, " my sister said.

"That's wonderful to hear. I'm proud of you two, " mom said. "Perhaps you can go there next weekend, if they don't object to having you around. Uncle Peter and Uncle James will be over next weekend, so they could use your rooms."

The uncles were a gay couple. Peter was mom's brother and okay. James was not so okay; he liked to complain about just about anything. I never understood why mom and dad could stand them; they often invited themselves over and that was always 'fine'.

I nodded. "I'll call Sally later today and ask if that's convenient."

"Good idea, " Liz said, adding the slightest wink to that comment. "Would be sad if they are out of town then."

We left the kitchen and went to our rooms to unpack. We had used nearly nothing of what we'd taken with us. I decided to crumple up some things and tossed them in the hamper. A bit of make-belief didn't hurt.

When I came back, Liz was sitting on my bed.

"Hey, " she said.

"Hey too." I sat down next to her and put a hand on her knee.

"That was wild, wasn't it?" She put a hand on mine and slowly moved it up her thigh.

"For real. I never knew..."

"Neither did I." She pushed my hand closer to her crotch, where I knew there wouldn't be any underwear. "I'd never thought I could be into girls that much."

"And I never thought it would be so hot to watch you with a girl. And with Dinah."

Liz grinned. "Dinah's just an older girl." She moaned a bit when my fingers reached home base. "Again, John."

I slowly poked between her lower lips again, finding the sensitive knob. She shuddered as I touched it. "You're sexy as hell, sis, " I whispered in her ear as my fingers probed deeper.

She looked at me as she leaned back so my fingers could slide into her pussy. "Maybe I'm bad for thinking this..."

"Thinking what?" I enjoyed her squeezing as I slowly finger-fucked her.

"I'm thinking that... ahhh... I've never had the hots for boy more than for you. Aahhhh..." She moaned again, covering her mouth with a hand so our parents wouldn't hear. "All the way home I thought of your cock inside me. And I was jealous when you fucked that waitress."

"Hey, I did you too, " I reminded her.

"Not enough, John." She grabbed my hand and pushed my fingers deep inside her, holding it there. "Am I wrong for wanting to be your girlfriend?" Her cheeks red now. "I never thought I'd ask that from my younger brother."

"You don't have an older one, " I said with a wink. My cock tried to rip my pants apart. My sister wanted to be my girlfriend.

Liz pulled my fingers out of her pussy and slowly licked them. "I know. I don't care, " she said, in between licks. "I want you. Kind of keeping it in the family."

"But Sally and Dinah aren't family, " I reminded her as I worried about my pants. "Maybe Sally wants to be my girlfriend too."

Liz sat up and unzipped my pants, as she'd noticed the precarious situation in there. As she released my boner and held it in a hand, she looked at me. "I can accept that from Sally. Sally's hot. Maybe I can be her girlfriend too." Then she bent over and gently licked the swollen head on my stiff one. Now it was my turn to lean back and watch my girlfriend sister suck my cock. She let it slip. "I'm going to ask her, " she announced before returning to my cock. "And you ask Dinah if we can come over for the whole weekend, " she added in another short sucking break.

"Yes, girlfriend, " I said, and tried not to moan as she sucked extra hard after hearing that.

She looked at me, my cock still in her mouth, and managed to say that I should take a picture of her, and send that to Sally, Dinah and her own phone. I took several pictures of her in action, and sent those off.

*

The day passed in the most tame manner after we'd left my bedroom. Neither of us had gotten off; we hadn't dared because our parents could walk down the corridor. Finger fucking and cock sucking could be covered up in time, a full on fuck session was a lot harder to hide.

In the afternoon we all sat in the garden. Dad read his phone again, mom had her knitting magazine, and Liz and I sat opposite each other, me with my phone and she with hers. She'd pulled up a leg and rested the heel of her foot on the chair seat. The hem of her dress rested on her knee, offering me a fabulous view of her pussy. There was no way I could get to it, but I did manage a few nice pictures of her, on which is was clear she was sitting like that outside, in the garden.

Suddenly Liz looked up at me and stuck up a thumb for a moment. I wasn't sure what that meant but it had to be good. She typed on her phone and a message popped up on mine.

'As you forgot to call Dinah, I texted her about next weekend. All good, we're welcome. And you got yourself another girlfriend.'

I sent back, 'That's so f-ing cool. Love seeing your pussy.'

Her answer came in quickly. 'Got pix?'

I sent the two good shots to her, Dinah and Sally, and Liz's reaction was fabulous. She stared at the phone and quickly put her foot down. Clearly she hadn't noticed how much showed, and she didn't want to risk our parents to notice.

'FUUUUUCK', her reply said. I was just in time to see her big grin.

Suddenly there was a message from Dinah on my phone, and judging from my sister's surprise, the same one reached hers. She told us of a very safe photo sharing app for the phone, which made sharing pictures a lot easier and faster. A friend of hers, a tech geek, had assured her it was totally safe and that no one without the two passwords could see them. She'd added the two passwords.

She'd bought the app and was sharing it with us. She wrote that she'd already uploaded a picture there and asked us to check it.

Liz was already busy typing. She was the first one to try such things. I got online and looked up the app and if it was safe. All I found were great comments on its security and privacy. That was great, so I got the app too, typed in the account number and the passwords, and found one picture. She'd taken that through the living room window and it just showed the street and a few parked cars. I thought that was pretty clever, to make sure things were working.

As I was looking at the picture, a little dot lit up. I tapped it. The screen refreshed, and another picture appeared. Liz had taken one of me as I was looking at my phone.

'Ain't that cool?' she texted me.

I replied that it was, and that I'd found that the app was really safe. After that I uploaded one of the pictures I'd made of Liz, with her pussy showing. Thirty seconds later there were three 'likes' on it, from Dinah, Liz and Sally. This was awesome.

More and more pictures came in; Dinah was uploading everything she had, including those with Amanda, the waitress, so I uploaded the other ones of Liz.

A message came in from Sally. 'I'm so wet that I'm slipping from the chair! ;p '

All this interaction made time go by quickly. Mom got up and declared it was time to get some food, and Liz was involuntarily recruited to help making it.

Then the next lightning strike from a clear sky happened. Dad put away his phone and said, "Son?"

"Dad?" I put down the phone too.

"You're seventeen, right?"

"Uh-huh." I knew it was remarkable that he remembered.

"Isn't it time you start looking for a girlfriend?" That question almost blew me out of my chair. I'd had girlfriends before. Nothing serious or so, but still. "Your momma and I talked about that, John. Your sister had a few boyfriends but nothing now. Which we understand, her being in the last year of school, but you... You have time for someone." He looked at me in calm and really fatherly manner.

I reacted instinctively. "I... I think I do have a girlfriend, dad."

"Really. And who is the mystery person? And when do we get to meet her?"

My eyes almost popped out of my skull. Why were my parents in such a hurry to get me hooked up so suddenly? Then the light came on in my brain. "Remember Sally? The girl Liz mentioned?"

"Oh really." Dad nodded as he reached for his phone again. "Now that's nice." He looked at the open kitchen door. "Momma! Our boy got himself a girlfriend! It's that Sally they saw earlier!"

Jesus! Did the whole street have to hear this? I wanted to vanish into thin air.

"Is that so. How nice!" That was all mom said to it.

Before turning to his phone again, Dad told me not to wait too long, and bring the 'lucky gal' over someday, so they could meet her. Before I could say anything, he was into his news app again.

A whack over the head with a rubber mallet couldn't have surprised me more...

My phone buzzed. I looked at the screen. My new girlfriend had put a close-up picture of one of her hard nipples in the app.

*

Over dinner Liz had decided to tease the hell out of me. "Did I hear that correctly? You and Sally decided to be boyfriend girlfriend? And you didn't tell me?"

I noticed how dad grinned at that remark. He was actually paying attention. "Uhm, we decided to take it slow. See if we match. Connect, you know, and see how things go from there."

It sounded lame to me, but mom said that was smart, while I could tell that Liz was almost wetting herself for pleasure as she kept asking me questions about how it happened and if we'd kissed yet.

"We did. Once. When no one was looking, " I said. Which was a total lie because Sally and I had been French kissing a lot, and in full view.

"Aww, my little brother is shy about his sweetheart..." Liz laughed, but I caught the wink.

"And when do we get to meet her?" mom asked. "You could bring her over from school and she can stay for dinner if she wants."

I nodded and promised I'd ask her, and already wondered how Dinah would react to that. Liz and I knew she and Sally always slept together, and there was a good chance that Sally would spend the night here instead. Pushing that aside, I joined the regular dinner chat.

After dinner, Liz and I found some excuse to go to our rooms. Once there, in her bedroom, I told her about the thoughts concerning Dinah.

"Yeah, let's hope that's fine. I'm sure she'll understand."

I took my phone and messaged Sally, asking if I could call her. Her reply, yes, was there almost instantly, so I called.

"Hey boyfriend, " she answered.

"Hey girlfriend, " I said. "Phone's on speaker so my other girlfriend can hear this."

"Other girlfriend?" Sally sounded surprised.

"That's me, " Liz said, and she explained how that had come to be.

"Oh. Sweet. Mom! Liz is John's girlfriend too!" Sally called out. "Mom says that John knows how to pick the best ones, " she reported back. "And she hates that she's a bit too old to be your girlfriend too, " came after that.

Liz and I laughed. Then I told Sally that our parents wanted to meet her, and that she was invited to stay over too.

"Oh! That would be so cool!" Sally sounded up for it immediately.

"But we're not sure how your mom will take that. You being gone, I mean." That was the big thing.

Sally conveyed my words loudly to Dinah. It was silent for a while. Then Sally's voice came back. "Mom's fine with it if I don't stay away too long. One night isn't a problem, she has several new dildos to try out."

Liz and I looked at each other. "Several?"

"Yeah, she kind of collects them. There are some really funky ones, like alien tentacle things, horse dicks and more. We'll have to show them to you next time you're here."

"Our boyfriend's cock is getting hard, Sally, " Liz reported on the status of my body.

"Take it out and blow him, Liz, " Sally said. "We can't have him suffer. I'm going to grab a handful of pussy to join the fun."

As Liz undid my pants and released my cock, I asked Sally whose pussy she was going to grab. She laughed and said she was currently fingering herself, but she'd switch to her mom as soon as she was done in the kitchen.

Liz slipped her lips around my cock. I uploaded a picture to our safe app.

"Oh my god that is so hot, " Sally said. "Seeing it happen as we talk!" She groaned loudly; clearly she was hitting a few of her own sensitive buttons.

Another picture popped up. Dinah had sent it, with her against the kitchen counter and her fingers deep inside herself. Sally couldn't stay behind of course, so she sent a shot of her pussy, with a bright yellow dildo sticking out of herself while she fingered between her labia.

"Liz, move over here, " I said. She lay down on the bed and I pulled up her skirt, shoving a finger inside her and sending a picture of that.

"Fuck, this is so hot, " Sally said, and groaned another time. "I so wish you guys were here..."

We knew we couldn't stay on for long without the risk of one of our parents coming this way, so we had to stop the session after a few more minutes.

Liz slowly licked the last drops of precum from my cock, and then smiled. "This was good, " she said. "I have an idea for later. In the shower."

"Let us know what it is, later, " Sally demanded, "and how it went. We gotta go too. And thanks for the call. I think mom just got herself off in the kitchen. I should go check."

We ended the call, and made ourselves decent again. For me that was difficult because a hard cock isn't easy to get under control...

*

Our parents were glad to hear they'd get to meet my girlfriend that next weekend. I managed to send a message to Sally, asking if she could send me a picture of her that I could show, and she did, some minutes later. She'd done her hair and wore a cute, pink top, and that picture was definitely approved by our parents. I could imagine how Sally's nipples would have looked in that top, making me hard again.

It was quickly arranged that Sally would come home with us next Friday, and spend the night. Mom had insisted that Sally would sleep in Liz's room. Liz had acted up a bit, mentioning how her privacy would be invaded, and I had played the hurt boyfriend, but we knew it was either that or nothing at all. The house lacked a guestroom.

*

Evening. Liz had gone to her room to 'listen to some music', and I went to mine 'because I sleepy' and I'd grab a shower first.

Liz's door was open.

"Hey. Shower plan?" I said.

"Yes!" She switched off the music player, hopped off the bed, and together we headed for the bathroom. That was safe, as mom and dad were TV bound.

Liz locked the door and we undressed in record time, both our phones on the small table in the room.

"Fuck, you look hot, " I said as I took her in my arms and kissed her. My cock already rose and pressed between her legs soon.

"You do too. And you feel hot." She twisted her upper body, rubbing her nipples against me. "I want to do something and I hope you want to as well. I want you to fuck me until you're close to coming, but this time you don't come inside me. I want you to come in my mouth. And I want to swallow everything." Her face beamed as she looked at me, and then she kissed me, our tongues doing the mouth tango for a while, which made my cock even harder.

When our kiss broke, she moved her hips a bit, rubbing my cock against her pussy. "I think we agree, right?"

I did ask her if she was certain, to which she said that every good girlfriend shouldn't be afraid to drink her boyfriend's cum. She nodded. "And we have to make Sally do that too. And I want you to take pictures of me when I do it, so we have proof."

"Fuck, Liz. You have weird ideas but I love them."

She grinned as she sat down on the edge of the sink, her phone in hand and spreading her legs. "I know. Let's get to it..."

I slowly shoved my cock inside her, which she photographed. Then we fucked, our eyes locked. It was fantastic fucking my girlfriend sister, knowing what was to come.

That knowledge made that I didn't need very long to get to the point when I was ready, so I pulled out of her and she knelt down, handing me her phone. I took a picture of her looking up at me, one how she took my cock in her mouth. Then she sucked, and teased my cock with her tongue.

Damn, my sister really knew how to make me get off fast.

"Close..." I moaned as the phone trembled in my hands.

She released my cock, opened her mouth and started jerking me off. Picture, picture. Then I came, taking pictures randomly as I had no real control over what I was doing for some time.

"Hmmm..." Liz beamed again. I took a picture of her face. Her cheeks were round and some cum dripped down her chin, onto her boobs. Slowly she opened her mouth, her head tilted back. Picture, and I was impressed how much I had deposited in her mouth.

She closed her mouth again and swallowed a few times. Then she opened her mouth again. Some of my cum was still visible. A few more pictures. "That was good..." Liz got up. "Really good."

"Here. Have a look." I handed back her phone and we looked through the pictures together. Some were totally useless and got deleted right away, but a good number was amazing.

She marveled at the one that showed her open mouth with my cum in it. "I'm going to put those in the app." That didn't take very long. The first reactions from Sally and Dinah didn't either.

"We want that too!"

Dinah added, "Did she really swallow it all?" and after a confirmation she sent, "I'm proud of Liz!"

After that, Liz and I got into the shower for a quick wash and a long 'girlfriend' lick, so she got off as well.