Not sure what to do.

While I was pregnant with baby #2. My husband would take videos of my Moms butt when she would be over visiting. He would creepily pretend he'd be on us phone but really he was following her walking through our house with his camera on. I found these videos while trying to show him how to use his phone. At first I thought it was me. He deleted them but Google syncs everything so they were in the cloud. I also found he search her name in YouTube. Which is creepy. We have 2 kids, I'm not the same girl is was when we met. I've never said anything to him because I like to bottle my feelings and unleash them at the right time. Basically I know he's masturbated to them, he's a butt guy. I dont know how to take this.

Growing up every guy always told me how hot my mom was and I hated it. He knows that I hate it and he's done the same thing as them.