Jake sighed at his sisters gentle motions, the non erotic nature of them clearly just a good cleaning relaxed his mind, to a degree. He scooted over so that she could rinse herself, trying to hide his erection that he was hoping wold soon go down. He figures perhaps he should return the favor though. "I can get your back, isn't the phrase like "you scratch my back..?" He formed a soapy lather in his hands with the body wash, moving over his sisters back and shoulders, up to the back of her neck. He was begin very careful as to not let his member poke her in the backside, and from his hands motions, she could tell he was avoiding "private" areas. It was actually rather relaxing. Now he understood why Mom liked to strut her stuff, its not that bad if you don't make a big deal out of it, right?<br/><br/>His erection wasn't subsiding at all. The knock on the door made him jump a bit. "Y-yes? I'm in the shower!" He called out, he didn't mention his sister, because he was afraid people would get the wrong idea. Little to his knowledge in this family though, that was very much the right idea.