Your sister

As you lay on the floor you look up and see the legs of your sister disappear under her very short skirt. Her thighs are separated slightly, and the junction of her thighs is concealed by a very small thong. You've never really seen your sister this close to naked before, and it was turning you on more than you'd like to admit.

Unfortunately with the towel being out of position it was painfully obvious to her where you were looking and the effect it was having on you.

"I... I... I didn't know you were home," she stammers. You are pretty sure she is staring at your cock, but you wouldn't know because you're having a hell of a time trying your eyes away from her thighs. "Fuck..." She whispers under her breath, but you managed to hear it. It was more of a moan than a word.

You managed to come to your senses before she does and you wrap the towel back around your waist while standing up. You managed to look at something of your sister other than the junction of her thighs, and you see that she has grown up a lot since you were home at Easter. She's developed hips like your mother's and her chest has grown considerably; her nipples standing straight out under her thin t-shirt making that even more painfully apparent. Her soft, pink lip was trapped by her teeth as she chewed on it in the cute way that she always used to, especially when she was thinking about something that you wasn't necessarily going to talk about. She had managed to look you in the eyes and you could see a devilish twinkle and those creamy green orbs.

"I just came," you said and then quickly clarified, "home. I just came home." You blushed is you unwillingly mentally undressed your sister. She giggled and that light in her eyes intensified.

"You better go take care of yourself, before Mom or Dad see you swinging that thing around," she said as she gestured towards your cock. You nod, and move past her into the bathroom. You here another door close almost immediately, and after growing up in this house you are damn certain that it was your bedroom door.

"Looks like you're going to take care of yourself, too," you say before getting into the shower, grinning like a cat that ate the canary. The hot water hits you and your hands immediately stray as they lather the soap over your body, gravitating towards your dick.