Let's call my DP's ex Susan. Whilst giving him oral sex earlier he said "such a pretty sight having my cock sucked by Susan". We have been together 4 years! He says it was a mistake. He said sorry. I am trying not to overreact but I think it has killed everything for me. Luckily we do not live together. Am I overreacting? I know he would never put up with the same from me. I am so upset. He must have been thinking about her at the time.