Same sitch here. Wife dropped ILYB bomb in Nov and then at the end of Feb the full EA was revealed after their passionate kiss. To her credit she told me all but now she just wants to be "let go". We met once with MC just after this in March and she said she cut off all contact with EA. She also promised me she would not see him while we were living together. Although I believe nothing from her now so it holds little water.
So here I am like you guys. Doing the LRT and GAL. But the day will come soon that I simply need to ask even if she lies. I will ask where we stand. LRT does not seem ti be getting me anywhere. She is very happy to play the "no talking game" and seems to be determined. At least she was last time we really talked about things 4 weeks ago. Maybe since she met with her own counselor she has doubts but I really don't think so.
Sorry to hear it. I would suggest to set a boundary as opposed to an ultimatum. Boundary is more "if you choose to continue these actions then x". I know it sounds the sane but you are not telling them to do anything different buoy are giving them freedom to act as they choose only that the actions have consequences.