Moms And Daughters

My dad through out my mom and sister because they were having sex with me, and I’m still seeing them even though my dad doesn’t know. But my dad has recently moved his new girlfriend in with her 19 year old daughter, and I’m now having sex with them. I’m beginning to think I have some sort of addiction to moms and daughter relationship, as even though I know it’s wrong, I can’t help myself and say no.