I don't think it takes much for them to size them up. I went through the samething. Counselors seem to ask us how we would react rather than saying, "hey dummie, he's gonna fool around on you again ya know." It's nice that he has some knowledge of your husband. It also makes it easier to understand what you have been dealing with.
Melting down is good. It helps us work through things and makes us stronger. Better to let it out then to stuff it down.