I woke up around 3 in the morning, naked, sweaty and still smelling strongly of sperm. I had my right leg draped around Mark's thigh, my inner thigh pushing against his hard cock as he slept. I could feel it lightly moving against me as he breathed in his sleep. I kiss his very sweaty neck and then his cheek. I pushed my wet crotch against the side of his hip and rubbed against it ever so softly. I kissed his cheek again, just a bit more passionately this time, hoping to wake him up but make it seem accidental. He groaned in his sleep and pulled me into him. I rubbed my crotch against his hip some more. I was dripping wet and enjoying how completely soaked in sweat we both were. Then I heard the bathroom door close. And my brain suddenly snapped back to reality. I was in bed with Jenny's brother, just a few hours after I had promised that nothing would happen between him and me. And she was in the bathroom just a few feet away from us, and the door was unlocked!
I shook Mark and whispered in his ear.
"Mark, you have to wake up right now and go back to the couch. Hurry!"
He opened his groggily and looked at me with a confused look in his eyes.
"Wake up and run to the couch. Your sister's in the bathroom. You have to get back there before she comes out!"
He was about to argue but I cut him off with a sharp: "Now!"
He stood up completely naked, his very hard cock bouncing up and down in front of me and turning me on even more. He looked around for some way to cover himself.
"Just make a run for it. The covers are next to the couch and the pillow you used last night is still there. Go!"
He ran out the door completely naked and left my door half-open. I heard him moving in the living room and I got back in bed. My pussy was so wet at that point that I couldn't help but reach down and caress myself. After a bit I heard the toilet flush and Jenny's footsteps coming out. Then I heard them stop for a bit. I thought maybe she had forgotten something. But she had just suddenly stopped. And she stayed there for a while. Then I heard them again, but instead of going towards her room, she came over to mine. I saw her silhouette in the doorway as she walked into my room.
"Maria? Are you awake?"
I quickly pulled my hand away from my crotch. It was covered in my juices. I could feel myself blushing in the darkness. I wondered if she could smell my horniness, her brother's sweat and sperm, my own sweat.
"Jenny? What is it?"
"Can I come in?" She asked, already in the room.
"Sure... what is it?"
She sat on the bed and I could see her vaguely in the darkness. She was wearing a short teddy and the panties I left her with.
"I just wanted to talk to you..."
I was more and more embarrassed. I knew for sure that she would have to be able to smell my juices as they were running out of control. Seeing her in the same panties that I had touched just a few hours ago and knowing that she had no idea about it made me even hotter than I already was.
"I just don't want you to feel offended in any way by what I asked you last night, you know?"
"What do you mean?" I asked her.
"Well, I only want my brother to do well in school, and you know how guys can get so obsessed with girls that they will get very distracted..."
"Oh, that. Don't worry about it."
"...and you are so beautiful, I think any guy could get obsessed with you, you know?"
"... thanks Jenny..." As my eyes adjusted to the darkness I could see her little chest moving up and down, her nipples outlined behind the very thin fabric of the teddy.
"If the situation was different, I would be glad for you and Mark to get together, but right now, I want him to go back to school and not get all distracted. You know?"
"Yeah, I understand..." I looked down at her legs which were exposed almost to her waist. Her thin white thighs were almost shiny in the darkness. I felt an intense urge to reach out to touch her, but I managed to stop myself.
"So you don't take it personally at all?"
I shook my head. "No, not at all." As I continued to stare at her thighs, then back up to her chest.
"Can I give you a hug?" she asked and I swallowed hard, suddenly remembering again my current state: naked, dripping wet, covered in sweat and drying sperm.
"... uh... sure..."
She laid down next to me and put her arms around my shoulders. I raised up a bit, my naked body covered by the sheets and I put my arms around her, letting them move just a bit lower down her back, pulling her tight into me. I let out a sigh.
"I really like having you as my friend. I feel that I can trust you.", she said, still holding me tight to her.
All I could think about was if she could smell me, and if she could, what would she smell and what would she think. But at the same time, the feel of her little body against me was driving me crazy with lust.
She laid down completely on the bed next to me, her head sideways on the pillow, as she half released her hug, keeping her arm on my shoulder. Her face was very close to mine and I could just barely contain the urge to push myself against her and kiss her hard.
"Mark has always been very special to me. I have a sister and another brother, but I've always had a special bond with Mark."
"Yeah? How come?" I asked. My sweaty naked body still covered by the thin sheets and only inches away from her body, just covered by the sheer little teddy and the red panties.