I would fire the counselor. Flirting, sexting, kissing, groping, sex are all forms of infidelity that destroy trust.
When I confronted my wife and asked what's going on with you and (her AP) her immediate response was WE FLIRT, THAT’S ALL, I HAVE NOT CROSSED ANY LINES
Yes, she had the balls to become angry at me.
I wonder if the therapist is either trying to minimize what you did OR she wants to know everything you did. For some, repairing the trust because one person was flirting may be possible but not if there was physical contact. Had my wife engaged in anything physical such as kissing I would have been divorced for over a year by now.
I think it was our second session and our MC asked my wife "Did you catch feels for him?" and my wife said yes. The MC was a woman in her late 40s or early 50s and trying to talk hip. I took the question to mean did you develop romantic feelings for him and I walked around for three days agonizing over my wife'sanswer. When I brought it up to my wife days later she said she took the question to mean was she attracted to him, but she did not have romantic feelings for him.
At our next MC session I explained the misunderstanding and said "Can we use words that adults can clearly understand? I walked around for three days suffering thinking my wife has romantic feelings for her AP."
I fired the MC before our next session. Ask your IC why she asked "but you didn't have sex with him" and if she says or you get the impression she believes that the affair is not that big of a deal because there wasn't any sex I would reply with "You are fired. You obviously do not understand that relationships can be destroyed by acts other than sex"