Only after I found this photos it all made sense for me. Many times my father come home from work and told my mother to get ready because they need to go out. They told me it was business dinners or meetings with clients but now I know. My father took my mother to have sex with other men and I'm almost sure that in one of the photos she's with her brother, my uncle John. He's doing her from behind and can't see his face but the shape of the body his the same.