Even though he wanted his step-sister to stay, he had to get to work too. Ben didn’t want to ask her to leave. Finally, she stood up to leave and when she rose, her towel accidentally came apart and fell to the floor. Ben’s eyes widened and he stared at her gorgeous tall, lean, athletic body. Her tits were magnificent, firm, and round. Her nipples were dark and hard. Claire had a fair amount of neatly trimmed hair around her pussy but her lips were visible. He got a great view of her ass when she bent over at the waist to pick up the towel. Ben’s face got red from the excitement of seeing his older sister stark naked, the embarrassment of what he was thinking, and how he was staring at her.
Claire picked up her towel and walked out of the room without wrapping it around her again and said, “Well, we’re siblings so I guess it doesn’t matter that you saw me naked.”
Ben hurried to the bathroom to jump in the shower and he jerked off while in there dreaming about his sister’s naked body. From that day forward, he looked at Claire much differently than before. While he had seen glimpses of her body parts previously, that was the first time he saw her completely naked and he would never forget it.
Things changed for Claire too. She noticed Ben hiding an erection and felt a little bad for arranging to drop her towel in front of him, making things harder for him in more ways than one. Claire liked the idea of teasing Ben and it turned her on thinking he would probably jerk off from seeing her naked. She felt bad for torturing him like that but not bad enough to stop her from doing it again. Whenever she had the chance, Claire would let Ben see her in her underwear, or give him peeks up her skirts or down her shirts. She even began to leave her bedroom door open just a little in the mornings when she was getting dressed. More than once she would look into her mirror and see Ben standing outside her door trying not to get caught peeping in on her.
When Claire knew Ben was watching, she would brush her hair in the mirror, giving him a view of her from the front and back. She would also apply body lotion to her long legs and torso making sure she had her legs open facing the door and taking time to play with her nipples. When Ben wasn’t fucking one of his girlfriends fantasizing it was Claire, he’d be jerking off at the thought of being with his step-sister and all the things he wanted to do to her naked body.
Claire was also having impure thoughts about Ben. She would masturbate to the thought of him watching her and knowing he wanted to do sexual things with her. Ben was growing up from a boy to an attractive man and she noticed he was now a hunk. When she was getting fucked by some of her boyfriends, Claire’s thoughts would sometimes drift into wondering what it would be like to fuck Ben. She would then feel guilty and try to get those thoughts out of her head but they kept reappearing out of her control.
Towards the end of the summer, things were silently heating up between Ben and Claire. He began to wear swim briefs around their pool instead of the type that looked like shorts. That’s when Claire noticed his muscular body more, especially his six-pack abs, full chest, and biceps. She couldn’t take her eyes off the obvious lump in his tight briefs. Her step-brother was pretty well hung. They would apply suntan lotion on each other’s backs, doing it slowly to make sure every inch was covered. A couple of times Ben got close to Claire’s breasts along her sides. Part of her wanted to raise her torso and give him access to her tits but she thought better of it. He secretly wished he could get his hands on her luscious tits too.