Fun Update. Just for anyone curious how this played out and what the explanation was. Spoiler, I didn't buy it.
My WW reached out to my STBXMIL to ask what had happened. Funny thing i caught. When WW talked with my DD, WW shared that her mom had already told her what happened. So why my WW reached out again to my STBXMIL for the story a second time is a bit fishy.
Apparently my DD asked my MIL what was wrong and "she knew right away what she had shared was wrong". I feel like this is just someone that for years, made excuses for their bad behavior look like ownership of their errors. My MIL is famous for words not matching actions. She is also Avoidant as fuck!
My DD then said that she would talk to me about what her grandma had just shared. She shared that she hated the way i was looking through her and treating her, and that if any man did that to her, she should cut him out, close the door, walk away and never look back. My DD has no clue about the affair my WW is having, or the relationship she's currently in with her AP that is married with a teen. My MIL does though.
MIL told my daughter to not "bother me with it" and that "she didn't need to go do that". This confused my DD who is 7 y/o to the point it ate her up inside. When my DD told me about what had happened, she started to beg me not to tell her grandmother she had shared this secret. She then freaked cause she now had 2 secrets. All that was handled ok, and i didnt even tell my WW. I can hold my DD's secrets and be there for her.
In the end, after 5 min of staring at my WW across our dining room table, as she used the same face, tone and approach she did for our 21 years together, especially during her times of deceit during the affair recovery part, I said nothing. When she finished explain what her mother told her, I asked if she was done. She confirmed and I said Ok and stood up. She looked shocked. She asked if i had anything to add or say and I said "Nope, I'm good". She said "what, you sure?". I said yep, if you're done, im good then thanked her for playing tooth fairy (cause same 7 y/o lost her first tooth today) then left to my room.
I felt triggered cause it was the same shit she used to pull on me when I was upset to get me to share, only to educate me on how wrong I was. It was the same tone her unfaithful, physically abusive father used when he tried to wiggle his way out of being an asshat. And it was manipulative. She wanted a big reaction out of me rather to try and make me feel better for no reason but to serve her own feeling shitty, or to pin me with it and tell me I also have a roll to play because her mom doesn't like the way im being civil with her.
They also never once addressed the fact that the relationship advice given was inappropriate, or the fact she shit talked me personally wasn't ok. And they DID NOT ADDRESS HOW MY DAUGHTER RECIEVED THE CONVERSATION. only what the intent was, and the realization of the mistake. Ownership is a problem with this family.
I am extremely happy to be rid of them. I feel so bad for bringing my girls into a world where their family is like this. I just didn't see the signs before the SECOND affair. Love can be blind.
Anywho, I'm not paying it any more mind since I have no control over what others say or do, all I can control is my own actions and my relationship with my daughters. There is no need or use to confronting my WW or STBXMIL because after 21 years, I've learned what they are capable of and it will only be used against me or a waste of energy. I'm saving that for positive things with my girls.
I can not thank all that have chimed in enough for their support. Finding this now has been such a awesome thing. I wish I found it earlier! This should be in all therapist toolbox.
I'll be posting more soon in other threads as I have more questions that im struggling with and really really appreciate all that have helped! Happy Tuesday all!