You being threatened by the fact he took her out on a breakfast date has nothing to do with her professional career. She isn't technically doing anything wrong. I would place the blame where it actually belongs. You and your husband have some serious issues that need to be addressed.
I found this comment extremely validating and helpful, thank you!
Break up now. She is being honest and you need to distant yourself from her before it gets harder for you
You being threatened by the fact he took her out on a breakfast date has nothing to do with her professional career. She isn't technically doing anything wrong. I would place the blame where it actually belongs. You and your husband have some serious issues that need to be addressed.
She’s going to miss out on some amazing experiences if she doesn’t drop this childish attitude.