I have a recurrent fantasy since a long time ago: inviting my girlfriend's ex-boyfriend to my place, make him sit naked on a couch while I undress my girlfriend (his ex) and we have oral, anal and vaginal sex. I want him to jerk off while watching us and if he wants to; take some photos.
I would also love to be the ex-boyfriend in that situation.
Have you done something like that in real life? If so, how did it go?
It also counts if it was an ex-girlfriend who was watching.
PS. Thanks to ukgoldfish; who made me remember this fantasy to share it with you and ask about your stories.