Sarah is surprised in the shower

"Fuck, fuck, fuck!" Her cock was by now fully hard and impossibly big and thick compared to a normal sized one. Its flaccid state had been already impressive. And now, fully erect, it had grown even further in length and girth, it had grown to be enormous. Bigger, longer and thicker than her own forarm. It's precum leaking tip reached up to the under side of her perky breasts. It was truly massive, yet Sarah wasn't sure that she was ready for her new appendage to be discovered.

Because the bathroom door was open, as well as the window, there wasn't much vapor at all, so that the transparent shower door was only very slightly fogged and would be able to hide very little, or in other words: Nothing.
When Sarah heard the foot steps on the stairs, she began to panic. The bathroom door was too far away to be closed quickly, as she would have to step out of the slippery shower to get there. All she could think of was to open the shower door, so that she could grab her large white towel, which hung close enough to the shower. In her distress Sarah tried to wrap it around her upper body, even as the water was still running. It quickly became wet and completely drenched, making the attempt quite difficult and almost futile. Instead she had to be content to cover her front with the wet towel. By pressing her impossibly huge cock upwards against her stomach, nesting its head inside her cleavage, she could press the towel over her breasts and thus at least covered her upper body and her shaft. Then she quickly turned around, her front facing away from the door. Apparently just in time: When Sarah looked over her shoulder, she could see her brother Adam appear in front of the bathroom's door frame.

Adam stopped dead in his tracks, as he could see his sister standing in the running shower. His gorgeous sister Sarah, who always pranced around the house in her skimpy cheerleading uniform, often together with her best friend Amy, who was also quite stunning. Adam of course had caught glimpses of his sisters body on occasion in the past. But nothing of that could compare to the sight in front of him now:
Sarah's complete backside was uncovered and clearly visible to him. Not only had she not closed the bathroom door, but the shower door was open as well. Almost as if Sarah had done this on purpose, as if she wanted to be caught like this.
Adam could see her fit thighs, as her legs were closed, and her exposed round and bubbly heart shaped butt. Her thin waist, and slightly muscular back only partially covered by her long and wet blonde hair. The skin of her whole body was wet and glistening. Her hands were pressing a soaked towel to the front of her body and against her breasts. That way, he could even catch a small glimpse of the side of her boobs. She looked over her shoulders and her face was slightly flushed from the warm water, her embarrassment, and, unbeknownst to Adam, from her drawn out masturbating session.

The scent from Sarah's precum still lingered in the air. An unknown, yet very arousing scent, that Adam couldn't describe, and it started to cloud his senses. He couldn't think clearly. It was almost, as if he was drawn in to walk towards the sexy body of his sister.

An author's note: On the topic of surprises:
Most author's on chyoa surely wish for some appreciation as well. So if you do enjoy a story or a particular chapter, please vote, and press the "thumbs up" button! Surprise the author ;-)
If you have any suggestions on what you would like to see, or even on what things you did not like: Feel free to leave a comment. The story also has a topic on the forum. Thank you!