You taking notes, Kadath? The boyfriend is PRESENT, he's SMILING for the most part, he's involved, and most of all, his girl isn't EMBARRASSED by his presence. THIS is cucking that doesn't need any kind of explanation.
Sidebar; did we see this other guy in 'Charisma Check'? I like that these two are CLEARLY enjoying their cucking, but I'm not crazy about their sharing it with THIS douche bag.