After Jon had done a bit of his homework, he decided to go get something to drink and bring it back upstairs with him.
As he walked down the hall, he noticed that the bathroom door was open, just enough to look in. And when he did, he felt like the biggest pervert. He watched Mikey giving his mom a sponge bath. His mom just sat there in the tub while Mikey moved the sponge around on her naked breasts.
Jon immediately closed his eyes. I didn't just see that, he thought to himself, and he continued on his way, faster than he normally did. He just wanted to get his drink and go back to his room.