Yes, I can imagine that it is very difficult for your daughters to learn their mother is experimenting with other women. It is certainly a very confusing time for everyone...including you.
You write:
Meanwhile W is continuing with her new life, on different websites now she told me.
If you're not comfortable with hearing this, I'd suggest that you put a hand up and say "W, I am not comfortable with hearing this--visiting those websites. It is disrespectful to me. Don't tell me those details. Thank you."
That is boundary setting...and in a healthy way too!
You just don't know what W is doing or with whom. If she's getting advice or not...that is mindreading. Ignore that line of thinking.
I am so glad you're GALing and doing really well in bonding with your daughters. You might want to think about having a family therapy with the three of you without your wife so you all will have a safe and neutral space to process all thoughts, emotions and reactions about your W's new friends.
