Of course you do

Your sister doesn't take too much longer to finish packing and there's still 35 minutes left before you need to leave, which is plently of time to have some have some fun. You stand behind your insestues girlfriend, wrap your arms around her waist, kiss her on the neck and whisper in her ear "A promise is promise"

She leans back into your touch, wraps her arm around your neck, pulls you into a deep kiss and when she pulls away she whispers back "And I never break my promises." She then lies down on the bed, moves her bikini to the side to reveal her smooth, red lower lips.

You unzip your trousers and pull your hard cock out. Your sister eyes it up and licks her lips hungily, like a preditor waiting to punce on it's prey. You lie on top of her and place your fuck stick to the entrence of your sisters wet snatch. She wraps her legs around your ass cheecks and pulls you in and you fall down on top of her.

"Ah. It's back home in my little choochie. Fuck me up baby. Fuck me up real good!"

You can't help but oblidge and start thrusting in and out of her cunt and by god it feels amzing. It's so tight and it's like this pussy was made for you. While fucking your sisters pussy with everything you have you lean down and capture her lips in your own.

She moans into your mouth, wraps her arms around your neck and slips her tounge in. You, in delight at this sudden intusion, stuck your tounge into her mouth and before you know it your tounges are wresling, fighting for dominance in the others mouth.

After a good while of fucking and making out you flood your sisters pussy with cum which sets off her own orgasam. She pulls away and says, slightly out of breath "Oh fuck. You always give me the best orgasams babe." She then realises what they were doing before and says in a panic "Shit! What time is it?"