His sister

He froze as the door started to open, his finger and thumb around his tiny pecker, pre leaking down onto his tiny M&M sized balls, legs spread...he was totally exposed as he heard the voice... Eli, his sister.
"Hey brat, you ready? Schools in an hour and you will not make me miss the bus on our first day back"
He was lucky...for now she had stopped with the door just closed enough to not see anything...he could move and cover but he needed to say something or she may just come in presuming he was still asleep...or he could tell her he wasn't decent but knowing how troublesome she could be it really depended on her mood if she would come in anyway if he admitted that, hell it may make her enter quicker.