Mom’s Secret Fun

My dad abused my mom when I was growing up. She felt empty from the abuse and alone so she started an affair. I knew nothing about it until I heard what I thought was my mom in pain coming from my parents room and ran to check on her. Lol. She wasn’t in pain at all. A strange man was fucking her asshole in CLASSIC leap frog position.
I never mentioned it to my mom or dad. I felt like it wasn’t my business. Plus I thought my mom deserved to do something that made her happy.