If your girlfriend would let you.

Laying so close to your little sister, you smelled the fresh nature in her hair while you heard her soft breathing as she slept. Then you felt weight on the bed behind you and the blanket getting closed. Your girlfriend’s huge tits in soft fabric squeezed against your back as her hot breath tickled your neck. You wanted to whisper “Sleep tight”, but before you could, you felt some light motions and then felt the bikini top getting removed from between her tits and your back, her freed breasts now massaging your shoulder blades. “What was she thinking?” you thought as you saw your sister in front of you. You tried to think about stuff to keep your boner down, but then you felt a hand slide over your hip and into your pants, even though there wasn’t that much space between your hips and Chrissy’s ass. The hand in your pants found your dick and softly started to stroke it. “Cin!” you tried to whisper as soft as possible “Cindy!”. But the hand in your pants were relentless and easily got their job done as you felt your dick harden. As your cock started to erect heartbeat by heartbeat, the hand in your pants left and grabbed your free hand and guided it behind your back. Your fingertips rubbed the hem of Cindy’s bikini panties and were urged to slip under them. Complying, your fingers slid under the fabric and found your girlfriends familiar warm cleft. The moment your middlefinger slipped in, you heard a soft moan behind you and warm breathing quickened as you softly let your finger rhythmicly slid in and out your girlfriend’s moist cleft. Her hand in the meanwhile slid back into your pants and found your cock, which, you now noticed, had rested in the crack of your sleeping sister’s ass. Cindy started to rub your cock again without taking it out of your sister’s asscrack, rubbing it’s head against it from time to time. You thanked your sister in silent prayer that she was such a tight sleeper.

“More…” Cindy’s soft voice breathed in your ear, making you slid your ring finger inside her too. “More!” she whispered again and she felt your index finger joining the other two. Your girl was now so wet a soft slurping sound was heard in the silence of the night, only joined by forcefully softened, but still audible heavy panting. After 5 minutes you felt Cindy’s hand left your pants and she pulled down her panties over your hand. A bit confused, you heard her whisper in your ear “Turn around.”. You very slowly complied and then laid face to face with her, determined eyes looking into yours and her breast half poking out above the blanket. She grabbed your pants and slowly pulled it down, freeing your now fully hardened dick resting against her belly. She scooted closer to you, slowly opened her legs, grabbed your cock slowly let it sink inside her wet, warm pussy.

Behind you, you heard your sister move a bit, then she was still again. When Cindy was sure your sister was sleeping tightly, she grabbed your ass and motioned you to roll on top of her, which you did. Then she moved her hands to your shoulders and nodded, showing you she was comfortable and ready to get screwed. You didn’t need to hear that twice and slowly moved in and out of your girl, who moaned breathless with each time you penetrated her. Her eyes locked to yours in the half darkness of the tent. The soft roll of the airbed made Cindy’s breast roll up and down too. To be slowfucking your girlfriend with your sister sleeping mere inches away from you made it all even more exciting and you had a hard time not breathing too loud. Cindy had a hard time keeping her voice down too and softly kirred in her hand when you entered her next. Then you slowly felt her legs moving up under the blanket and them wrapping around your back.

Her free hand came up to your head and cupped it from behind and coersed it down. As you continued to push your cock up as far inside your girl as you could, you laid your head beside her, breathing against the plastic of the airbed. Cindy, touching the airbed with most of her body, began to notice another movement against the airbed, originating from the side of your sister. She looked towards Chrissy as she felt your dick sliding inside her again, pushing her up a bit, and saw your sister slightly shaking as a part of her body made the rapid, irregular movements. Cindy smiled. Chrissy wasn’t asleep anymore. She was getting herself off to the sounds and movements of her brother fucking his girlfriend.

Gently, without letting you notice it, Cindy’s hand moved over to Chrissy’s body, softly touching her back, making her froze up. Then, as Cindy’s hand sensually caressed her back, Cindy felt the movement continued. As Cindy’ hand slowly slid over Chrissy’s back she felt your sister’s ragged breathing. Secretly caressing your sister while getting fucked by you, knowing your sister was awake and touching herself to you screwing your cunt made Cindy extra horny and she softly moaned a bit louder, just enough so Chrissy could hear her but it wouldn’t rouse your suspicion, instead coerse you on. As you felt you got closer, Cindy noticed it too by your movements and change of breathing close to her ear, she slid her hand on Chrissy’s back down the girl’s body and under the fabric of her panties.

Then she let her middle finger slid between your sister’s asscrack and made it dove straight into the younger girl’s anus. Cindy felt the other girl shudder as Chrissy quickly grabbed her mouth to stop her from moaning. While you neared your orgasms, you and Cindy became less careful with your movements and moaning, going up in the heat of the moment. Your movement became more shocking, going for long deep strokes while you heard Cindy’s little moans raised in pitch with each penetration. This did cover up Cindy’s moving her finger rapidly inside your sister’s anus though and the rapid movement of your sister’s own hand.

“What a trooper.” Cindy thought as she still didn’t hear a pip out of Chrissy. “She must be one of those silent squeelers.” Cindy reckoned. Then her own orgasm hit her, making her moan out loud, quickly silence by you putting your mouth on hers. You felt her moan uncontrollably in you mouth and felt her pussy muscles work on your dick, so you grabbed her ass and pushed as far inside your girl as possible as you could and released your sperm deep inside her. Both your body spasmed on the airbed, undeniably noticeable by your sister, but that didn’t crossed your mind as that was totally focused on the makeout session you had with your girlfriend, tongues strangled into each other as you both enjoyed the streams of cum getting shot inside Cindy’s welcoming womb. Your mind still burning hot from this kinky screw session, you didn’t notice the soft “fuck” that was uttered by your sister not able to get off, leaving her hot and bothered.

Cindy’s hand, having stopped her movements when she came, softly moved in and out of the other girl’s anus, before retreating and giving Chrissy’s ass a few soft, knowing and caring squeezes. Then Cindy gently pulled out of Chrissy’s panties. While your dick got limp, it slowly plopped out of Cindy’s wet cunt. Cindy slowly released you from her leglock and put her legs down, so you could roll off of her. You rolled on your back between the girls and enjoyed the afterglow of your excited little session. You rolled over to Chrissy and was both surprised and glad to see she was still asleep. Cindy kissed you on the cheek and whispered “Thank you.” , put her arm around you and then fell asleep hugging you with her big tits and dripping cunt. Not being able to pull up your pants this way you decided to wait until her grip weakened and pull up then.