Madison is struggling with her feelings

Madison rushed back to the cabin. Watching Kurt and Heather had riled her up and Ashley's teasing had only increased the turmoil in her thoughts. She jumped onto her bed and shoved a hand under her bikini bottoms, **** to get off and end the crazy feelings welling up inside her. She tried to picture Zack kissing and touching her. She'd masturbated thinking about him in the past and it started off well enough. In her mind, Zack stripped her and knelt between her legs as she spread herself for him. She imagined his tongue licking her instead of her own fingers. As she continued to play with herself though, Zack morphed into Brandon. Oh Mads, his voice moaned from between her legs. She couldn't stop herself. Her hips bucked and she came to the thought of her own brother eating her out.

What the fuck am I going to do? Madison lay panting in her bed, ashamed of her actions. I can try talking to Heather again...maybe. But fucking your cousin and wanting to fuck your own brother are a little different. Not to mention her virginity. Losing your virginity to your own brother took things to a whole other level. A knock sounded at the door and Madison hopped out of bed.

"Mads, are you alright?" Brandon called through the door.

Madison felt like a little kid caught with her hand in the cookie jar. She quickly made sure her swimsuit was in order and her hair wasn't in disarray. She opened the door a little and peeked out at her brother. "Yeah, I'm fine. I just...I needed to come lay down. Too much sun maybe."

"Oh okay," Brandon shuffled awkwardly. "I was...I was worried Ashley had upset you. You know how she gets. She just says stuff without thinking."

It was Madison's turn to be awkward. "N-no, it had nothing to do with her. I think I'm a little better now. But I should probably shower and wash off the lake." She pushed past Brandon and quickly slipped into the bathroom.

Brandon watched her go and shook his head. He started to head back out but noticed the bathroom door hadn't closed entirely. It was cracked just enough to appear closed, but wasn't actually latched. Moving on instinct, he slowly cracked it open. He stopped almost immediately and he sucked in his breath. The cracked door only allowed him to see the mirror inside the bathroom, but he could clearly see Madison in the mirror. Her bikini top was already off and she was bent over peeling off the bottom. The bottom hadn't really hidden anything, but once it was off Brandon couldn't help marveling at his sister's ass. It was perfectly rounded from years of volleyball and then cheerleading. As she stood back up, he could see her breasts fully. They were a little smaller than Ashley's but her nipples stuck out, either from cold or arousal. Ashley had mentioned wanting to suck on them and Brandon couldn't stop himself from picturing her do that. He felt his dick growing hard and the mental image changed to Ashley sucking on one breast while he sucked on the other. Fuck me. He shook his head and tried to clear his thoughts as Madison climbed into the shower. He couldn't really see much in the mirror now and after a few seconds deliberation, he pulled the door shut and headed out of the cabin, trying to get his thoughts under control.

Madison heard the door click closed and snapped her eyes to it. Was Brandon...was he peeking on me? She felt another stirring between her legs and didn't bother trying to pretend she was thinking about anyone other than Brandon as she started playing with herself again.