I tied up my mom for my dad, but he didn't come home, so I went in

Don't you dare fuck me, son, I'm tied up! At least wipe your sperm off

Why am I showing you my ass, son? Come on in already, fuck me to orgasm

She fell asleep next to her older brother, and he tied her up and fucked her without asking

Parents fuck like that, so we can do it too - let's do it in the ass already