WTBS, I read your comments on the other thread that you referenced. You are frightened about separating and feel grief over your losses. Of course these are normal emotions, but if allowed to take over, they can hamstring and keep you from moving forward.
Last month H lied about his weekend whereabouts (said stag do) and was actually with OW, SIL and BIL at a restaurant attached to a Travelodge. SIL put this on Facebook. You assumed that H and OW had spent the night together at the hotel.
You didn’t confront H, because if you acknowledged any of this, you “would have to do something about it.” You are trying to carry on and not think about it. At times you are angrier at OW than at H.
I agree with others that H may be gearing up to leave you for OW. Your in-laws are facilitating this, as they were present in the cozy group at the hotel restaurant, while you were excluded.
H does not care about your feelings or respect your dignity. He is having an affair in plain sight. To be brazenly leg-rubbing at the table was despicable. They were having a date right there, and he was making a fool of you. His previous lie about the February weekend while publicly cavorting with OW further demonstrates his sense of entitlement to betray you and treat you with contempt.
H already knows that you know. You were confronting him when you kicked him under the table, and when you made the ‘tart’ remark. He is going forward with that knowledge.
With respect, you are stalling. Several weeks ago in the other thread, you said you’d made arrangements to see the financial advisor, but now it won’t happen for a few more weeks. You mentioned your preference for taking “baby steps.”
You will never find your perfect moment or your perfect evidence, but you absolutely have enough right now to end your marriage. The lying and intimate leg touching would be enough for me.
You are wasting your time raging about this irrelevant OW. Playing games with words to insult her, focusing on the meaning of her paying for meals, worrying about how to socialize with her—all are distractions. Personally, I wouldn’t even go to the upcoming event. Why give H another chance to publicly humiliate you?
I would take action soon. Effectively dealing with his lying and infidelity should be your priority. I would get financial/legal advice ASAP. You can do it. You are putting your mental health and overall well-being at risk by swallowing your torment and procrastinating, while he is making a mockery of you. All of your plans don’t have to be finalized before you make a stand.