Waiting for a reply from the both of them...
After that will see what reply is..
if they kindly invite me (after me asking) then no doubt I will probably decline the invitation as I've only been invited because I've had the guts to ask. I don't want to be there if it's as a gesture because I've asked for it.
This is a toxic mess and I suspect, you also display that behaviour.
You are trying to force an invitation you say you dont want so you can decline it.
That's not waking up, its not strength or putting yourself first. It's trying to create more drama.
As it stands in the last 4 months, you decided to not have them over for Christmas, didnt attend the wedding and then kicked their son out. I am not saying your shouldn't have done those things. You should have.
It may be that they are trying to punish you. Or it maybe that, simply, they know the relationship is on its way out/ over so are stepping back.
My mum is dead, I get wanting to try and recreate something. But yih are an adult with kids. You can't be dragging your kids into messes like this. For their sake just end it and walk away.
Honestly, if my brothers girlfriend started distancing herself then kicked him out, I would be thinking it's done. At most I would probably say to my brother 'I am arranging X. What's going on with your girlfriend? Is she likely to come do you want to invite her?' And I would be warning him I didn't want any drama.
I wouldn't take a boyfriend that had kicked me out a month before. Wether we were working on it or not.
You pulled away, which I think yiu were right to do, and so are they. But dont try and stir more trouble out of this.