i chose humiliation experience, but it would be for her to humiliate me.
Id take her for a night on the town buying her things while she flirted with everyone. Of course I would pay. We'd go for happy hour drinks and she would pick up a guy for the night. The three of us would then go to dinner, she would sit next to her new man, hand on his thigh the whole time being flirty with him in front of everyone. she would plant kisses on his face and leave lipstick on it during dinner. She would order for me (identifying me as her husband) the whole time. I would get the bill for all 3 of us.
We would then go get the car from the valet. Shed be all over her man and give the car ticket to the valet saying to bring it to her husband and point to me. She'd tip the valet with her underwear while i got in the car, & they got in the back saying....here i wont need these for the ride, my husband up front will buy me more.
they would make out and foreplay in the back seat all the way to the hotel. I would be tied up under them while he railed her all night and i would suck him clean and clean her up in between sessions. While she was being fucked, she would slap my balls and SPH me all night.