My girlfriend just called me with a devilish idea

She wants to come over tonight and edge pet for a couple of hours until he's bursting. Then she things we should give him a little CBT with cigarettes until his cock is to sore to touch then offer to allow him to fuck me in the ass knowing he can't do it (because no one gets inside me ass except with a tongue). We'll tell him that he can have my ass but if he turns me down or can't cum, both of us are going to fuck his ass with strapons that are too big for him.