Son can't stop spying on his mother

I can't stop spying on my mother. I love to watch her in the shower, getting dressed, putting away groceries. Today, I walk in on her in the shower, and though she doesn't know I noticed, she sneaks little glances at me while pretending I'm not there. This afternoon, I hear mom & dad having sex in their bedroom and I'm really turned on by the noises mother is making. I creep up to the door & push it open a little. Sure enough, she's riding dad's cock. I go into the living room & start jerking off. But then mom comes in, still completely naked. "Maybe this is a phase & we just need to get it out of your system" she suggests. "Just this one time. No more spying or I might have to spank you."