Ever since my sister had found me in her room, masturbating into her panties, we started to have mutual sessions more often. Whenever we were both extremely horny, we'd make sure everyone else in the house was asleep and then we'd slip into a room and have a mutual masturbation session.

Usually we both just watched as each of us masturbated. She would finger her cunt as I stroked my long, hard cock. Sometimes, if we were really, really horny, we would switch roles and I would finger my sister as she stroked my cock.

These sessions never turned into more than this. We would masturbate, orgasm, and then go back to our rooms. We were both just curious, horny teenagers, who liked to show-off while they masturbated.

Despite these sessions, I still enjoyed my sister's panties. I loved finding them in the hamper, and sniffing them and licking the crotch while I slowly stroked my cock. Then once all the goodies were gone, I liked to put them on and model for myself in the mirror. Looking at my cock bulge out of the silky fabric.

And while the first time I had gotten caught lead to a blow job, the second time my sister caught me with her panties, it lead to a lot more. I ran into my sister in the upstairs hallway. I was on my way downstairs to watch some TV. My sister had just got back from cheerleading practice and was a big sweaty mess. She brushed past me, without saying anything and stomped into her room and shut the door. I remembered I needed something in my room and went back to get it.

When I exited my room again, my sister had just slipped into the bathroom. I peeked into her room and saw the clothes she had just worn sprawled on her bed. I heard the shower running and knew that the coast was clear.

I knew immediately what I wanted. I hoped to find the panties she had just worn buried beneath her sweat pants and t-shirt. I hoped to find the panties that she had just slipped off her body.

Luck was on my side. I picked up her sweat pants and out dropped the panties that she had just been wearing. Immediately as I saw them laying on the ground, my cock was getting hard. Just the thought of the panties made me horny.

Reaching down, I grabbed the panties and brought them to my face. I turned them inside out, so that I could have more access to the crotch of the panties. That is what I loved about them. The crotch. That's the part that sucks up all my sister's sweet pussy juice.

During all of our masturbation sessions, I had never gotten to taste my sister's juicy cunt. She had tasted my cum, mainly cause I had blown my load into her mouth. But the only time I got close to my sister's pussy was when I licked the inside of her panties. And these were a real treat. They were fresh from the source...

I inhaled the sweet fragrance and lashed out my tongue to get the first taste of her sweet pussy. My cock was instantly bulging in my briefs, begging to be released. I was so lost in the joy of finding these panties, that I just dropped my pants right there in my sister's room and began to stroke my hard cock, while my tongue collected every sweet drop of pussy juice.

I had almost licked up all the pussy juice, when the door flew open and my sister hurried into the room. She let out a shriek when she noticed me on the floor, stroking my cock. She was so startled that she almost dropped the towel that was wrapped around her freshly-showered body.

"Geez brother, aren't we a little horny today?"

I was surprised that my sister was not mad. It was still something that I had to get used to. Normally I would have expected her to yell and scream and threaten to tell our parents. But she just seemed to act like this was a regular thing.

I sat there on the floor with the panties in one hand, and my slightly erect cock in the other. My sister was looking at her face in the mirror, the towel still wrapped around her. The water glistened off her shoulder, and down her tall, beautiful legs.

"Dear brother, could you do me a favor?" my sister suddenly asked, turning to face me, "Could you put those panties in your hand on and model them for me."

I didn't have to be asked twice. I jumped up and quickly shed the rest of my clothes. Then I put the panties on and tucked my cock away, creating a bulge. My sister watched from the other side of the room as I turned this way and that, modeling her panties as my cock made a bulge in them.

"Okay, now drop those panties to the floor, " she cooed.

I grabbed the sides of the panties and pulled them from my waist. My cock sprung up, all seven inches of it throbbing. My sister smiled, and let go of the towel. It unravelled and fell to the floor, revealing her large ample tits, and luscious pussy.

Her nipples were fully erect and seemed to be pointing right at me. The triangle of pussy hair was neatly trimmed, not shaved clear, but not bushy either. It glistened in the sunlight that peeked in through the window. Some pussy juice escaped her pussy and ran down her leg. Obviously my modelling show had turned her on.

Without a word, my sister was on her knees in front of me. She smiled up at me a devilish, horny smile, then took the tip of my cock into her mouth. She swirled her tongue around my purple cock head, while slowly stroking my shaft with her hand.

She played with the tip of my cock for a while, then began to feed herself more and more of my cock. She took in a few inches and then slid her mouth up to the tip, where she played around with the cock head again.

Then suddenly, she stopped. She got up and climbed on to her bed. She lay down on her back, and spread her legs. The pussy juice was flowing from her, making a puddle on her bed.

"Okay, big brother eat me."

I kneeled down beside the bed and brought my face close to her pussy. I could smell the sweetness of her pussy float up to me. I took my tongue and slowly circled it on the outside of her pussy lips. Slowly, circling around and around her pussy lips, sending wave after wave of pleasure through her body. Then I drove my tongue into her pussy, exploring the walls of her pussy and her clit with my tongue. Waves of pleasure rippled through her body. And then suddenly, she grabbed my head and stopped my licking.

She rolled over and positioned herself doggy-style. She turned back to me, the same devilish smile on her face.

"I want it up the ass."

I grabbed my hard cock and guided it to the entrance of her ass. My cock head twitched with excitement. Slowly I began to feed my cock up my sister's tight, hot ass. I got the cock head in, then stopped to let her adjust to my cock.

I continued to slowly feed my cock up her ass. It took some time for us to the whole thing up there, but we finally did. Once I had the whole cock up her ass, I began to pump her ass slowly. She moaned with pleasure, reaching with one of her hands to finger her cunt.

I began to pump my cock harder. My sister responded with louder moans. Within minutes I was fucking her ass hardcore. She screamed out loud, still going at it with her finger up her cunt. I kept up my thunderous pace, hammering my sister's ass. Finally I couldn't hold it anymore and blew my hot load up her tight ass. We collapsed into a heap on the bed. I withdrew my now soft cock. A trail of cum began to leak out her ass, mixing with her pussy juice that was dripping out of her cunt.