How do I get her interested again?

My wife used to have a boyfriend (Mike) that could consistently get her soaking wet just by being in the same room with her. She took it very slow with him and so she would always come home after her dates incredibly turned on and wanting me inside her. Once I entered her, she’d tell me how small (5.5″) and inadequate my penis is and tell me how she couldn’t even feel me (which I don’t doubt at all based on how sloppy wet and loose she felt to me). She’d then start telling me how much she wished Mike’s long cock was inside her instead of my tiny penis. Despite not feeling me she’d always manage to cum hard while imagining Mike fucking her while grinding her clit on my pubic bone. When the day finally came for the two of them to finally have intercourse, Mike was not able to get hard with me in the room. It ended shortly after that and ever since then my wife has been less interested in making me a cuck. I’m looking for advice on how to get my wife back into this lifestyle….please help.