Family Ties/Go to Heather's room and tell her the score.
Despite your desire to fuck your mom, common sense wins out and you go to Heather's room to tell her the score, fixing yourself up as you did. You entered her room to see dressed in the skimpy bikini top your mother bought her and a pair of Jean shorts that emphasize her curves.
Heather looked up at you and smiled. "So you managed to get away from mom. I don't know if we have time but if you want..." Your sister trailed off, sitting on her bed and casually unbuttoning her jean shorts to show you she's not wearing anything under them at all.
You can feel your boner harden in your pants but you managed to ignore your lust for a minute to speak. "Actually, I have something to tell you."
You told her about what mom wanted to do and Heather's eyes widen in response. Soon though she lets out a chuckle and stood up, walking over to you.
"I should have seen the signs honestly. No wonder she never complained or talked to dad about you peeking on her," Your cheeks blushed and your mouth opened to response only for Heather's mouth to kiss yours. The two of you wrestled tongues for a bit, moaning and grinding against one another before managing to pull away from each other. "Alright, I can wait for a bit but you have to fuck me first."
She pushes you out of the room and you heard her moan in delight. 'Six whole hours. Dear god I'm going to love this trip."
Well that was done so without further ado, you got dressed and packed a few things for the trip. A PSP, some games for it, a couple of books and etc before heading down to the R.V. You saw your mom talking to your dad, whispering something into his ear and getting a nod in response. Your older brother Jacob is sleeping on the pull out in the center compartment of the R.V., never really a morning person, while your twin drew on his face.
You slipped into the back bedroom to see Heather sitting seductively on the bed, ideally toying with the string of her bikini top.
"So you wanna wait until mom gets here or..," She teased, giving the string a yank and allowing it to fall from her body, exposing her big tits. Before you have a chance to respond she stands up and lets her jean shorts so she is standing completely naked now. Her pussy was wet from waiting and the way her body slightly shook told you that she can't hold herself back from much longer. Honestly neither can you with your cock straining against your clothing. "You want to get started now?"
Or.