Son And My Panties

My son has been jerking off in my dirty panties for about 5 years now. Although I know all about it, I've never said anything. I think this is a perfectly normal step in a young boy's sexual development. Whenever I am changing my panties, I make a bit of noise when I drop them into the laundry hamper. I then secretly watch to see him go into the laundry room, and check in the hamper. I've seen him remove my dirty panties many a time and slip them into his pocket. He then goes back to his bedroom. Not hard to figure out what he's doing in there.