Your biological father died when you were a child, so after a few years, your mother remarried, to a man named William.

It was late at night, William and your mother were watching a movie on the sofa in the living room, while you were in your bedroom. After a few hours, your mother fell asleep, so your stepfather left her alone, and went to your room.

This would be the perfect opportunity to see you, without your mother knowing.