wife preparing to leave me and kids

[blue2010]

OM broke his own no contact yesterday I am getting advice to expose the affair again. The reality is I have little proof. Should I confront my W first and make sure OM W confronts him as well? She is suppossed to take the next step toward purchase of property today unknown if she is approved for a loan yet she did seem upset yesterday at the idea of her name actually coming off our house.
The real issue rt now. What do I do about the OM contacting her again? There has only been a verbal and text NC not a letter.