Learning to fuck with a 54-year-old woman

Lately, my mother and her boyfriend no longer hold back when it comes to having sex at home. Moreover, they don’t even worry about whether I might be around and catch them. This morning, I found them fucking like absolute novices on the living room sofa, and I got so horny watching them that I couldn’t restrain myself, and I masturbated while watching. Fortunately for me, they caught me and invited me to join in their pastoral family scene.