Dealing with a WW trying to save marriage

[SoTorn]

So. Wife is back home from trip to see her dad. She is trying to make small talk but I am just short but showing her I am in a good mood. Been going out to the gym and with friends etc.

How often can I tell her that I am not in an open marriage? I want to tell her that because I know she's still talking with OM. She doesn't have much to say and neither so it at this point.