I don't feel the need to have any interaction with OM2's sister or OM2's niece simply because they didn't directly wrong me
It does seem like you're projecting some of your anger towards your XW for betraying you upon her. I suspect if any other parent whose kids played with yours invited your kids, you'd politely accept or decline (e.g., option #4), right? I agree she doesn't deserve preferential (family-like) treatment, but I wonder if she deserves sub-par (betrayer-like) treatment. It's not her fault you're triggered? You do you. Where you can extend kindness, I think it can help to reduce drama. I'm blessed to get along with my ex.
I wouldn't want to be involved with OM2's sister in any way. It's not her fault but why get that close? Not that you're wrong for your choice either and I certainly don't see this as high and mighty.
And for all the triggering that people get CW walking away, we should probably, I dunno detach from all that. The beauty here is all the different advice and perspectives. I don't see anyone crapping and Sandi or neffer. Not to mention LH you tell people all the time about how they should turn into a WAS after being a LBS. I appreciate your perspective on that too and I think you really help empower these guys who are feeling low.
Truthfully I don’t give a $hit that CW is a WAS. If you follow his thread he is definitely dealing with his own karma anyway. I was pointing that out because he was bragging about how wonderful his relationship is with his exw. IMO way different circumstances when you are the WAS. As for Sandy and Neffer, pretty sure they never divorced their spouses. Appreciate the compliment in the end though.
