I think it requires a lot of emotional discipline to not engage or speculate or feel strong emotions about the ow. Our logic tells us that she is a stranger, not our 'problem' to deal with and perhaps simply a symptom of a changed spouses desire for a new self/life. That really she is not our business.
Yet this stranger - at a minimum - played a significant part in destroying your life and family for no other reason than bc it gave them something they wanted. And in some cases, doing that is not enough but they also stalk, threaten, badmouth or steal from you albeit with the collusion of your spouse. And many ow in particular do try quite hard to pull the LBS into whatever triangulated story they are telling themselves and others. My xh's ow has frequently said things claiming to speak on his behalf, some pretty awful and some about our own history together. It is impossible to know what is true or false when my h/xh chose not to speak for himself hardly at all of course. It feels like a cruel attack bc it is a cruel attack; my only redress was as my father used to say to 'not let them see you sweat' by ignoring and blocking and using the law where appropriate. But I have often wanted to scream, throw things and punch people. It is sometimes very frustrating to feel abused by a stranger without being able to have a voice that feels heard, even when your brain keeps telling you that ignoring them and their life is the very best thing.
Sometimes tbh it feels as if your spouses sees you as an enemy to be destroyed and ow, along with other folks or family members, are part of an army against you. For me, for instance, the few family members who were at his marriage to ow who knew me/us for years were passively saying that they found it acceptable for me to be threatened, stolen from, gaslit and ignored when I was grieving and ill. As long as my h was 'happy'. I have said and done nothing but that is not ok to me and will never be ok. They should feel ashamed of every meal they had at my table, every bit of family support I provided, every gift, every card...but they won't bc it is easier and they do not care what happens to me either. So, ow/om is part of our occasional need to vent but for many it also includes family or friends who betrayed us too. No contact can end up being a pretty broad scythe
I suppose my hope is that if ow is a bit disordered (from the facts or actions you can see without getting into complicated diagnoses lol) ignoring them is a bit like Tinkerbell in Peter Pan, that being ignored as unimportant is their kryptonite.
T: 18 M: 12 (at BD) No kids.
H diagnosed with severe depression Oct 15. BD May 16. OW since April 16, maybe earlier. Silent vanisher mostly.
Divorced April 18. XH married ow 6 weeks later.
"Option A is not available so I need to kick the s**t out of Option B" Sheryl Sandberg