After your cousin's wedding and party, you and your sister stumble back to the hotel room you were supposed to share. When you get inside, both of you discover there is only one bed. A quick call to the front desk proves unhelpful because your cousin's wedding has the hotel completely booked and there's nothing you two can do. "You don't mind sharing do you?" You don't mind- you and your sister shared a bed as kids, so she's not surprised you're cool with it. She stumbles around and is so far gone from a night of partying, she forgets you are in the room. She peels off her tight dress and collapses into bed. Her boobs are huge, her body is so voluptuous and you can't help but just stare. It's enough that she was dancing with you so much, but seeing her naked brings all sorts of 'wrong' feelings into your brain, and into your swelling cock. You accidentally make a noise and she wakes up, still trashed. She's being oddly flirtatious after seeing your hard-on and mentions how horny she gets when she's had a few too many. One thing leads to another and she's on her knees in front of you, loving the size of your cock, wrapping her red lips around and sucking it. You think it's all going great until she has second thoughts and gets up and changes into pajamas. That night, she wakes up feeling your hard-on poking her thick ass and levels with you that you should fuck so you can both get some shut-eye. Realizing your parents are in the rented room right next door, she covers her moaning mouth with her hand as you plow your cock into her. Were you supposed to know she wasn't on birth control? "You didn't pull out??? I could get pregnant! UGH!" The next morning, you realize she's left the bed before you, and believes you aren't awake when she comes back into the room, dripping wet from the shower. You watch her wet body pace around looking for a towel and sneak up behind her for a quicky before your cousin's breakfast for the wedding party. You bed her over the bed and go at it again, fucking her, watching her tits bounce, making her writhe and clench the bed sheets. You're so turned on from grabbing her huge hips, that you're too distracted to remember to pull out again. You're worried, but then again- you just fucked your sister twice and even though it was so 'bad'...it felt so good to finally fuck her