Stephen Bear found himself confronted by girlfriend Lillie Lexie Gregg on Celebrity Big Brother after spending days cheating on her with housemate Chloe Khan.
For the first time in the house, Bear was stunned into silence as she arrived during the week's shopping task and announced she had broke up with him.
She broke down in tears as she told him he had "absolutely humiliated" her.
Lillie said: "The embarrassment and the humiliation I've had, I've never experience anything so difficult in my life. It's so hard you could do that to me and my family.
"It's all one big game to you, but its a joke at my expense. You've absolutely humiliated me."
Bear only shrugged after she spoke. Viewers found it hard to watch.
In the Diary Room, Bear burst into tears, saying: "It's the hardest thing I've had to do, I would have married her. That's the girl I was going to be with for the rest of my life."
He said Lillie had a "lucky escape" from him.
No-one was feeling sorry for Bear, despite his best efforts to make himself seem like the victim.
His true colours were shown when he later told Lewis Bloor and Marnie that Lillie had only appeared to make him appear "really stupid and bad".