My wife and her sister play with the console all day

Every time my sister-in-law spends a few days at home with us, they get on my nerves, they can spend a whole afternoon playing the damn console, I promise you!! It is also true that my sister-in-law is very accommodating to me, the girl is slutty like herself and I often have sex with her while my wife is with the game and since they last so long she doesn't notice anything.