Oh ((((((((Ancaire)))))))) I just want to give you such a big hug after reading your post. I'm so, so sorry you've had such an awful few days. I think it is only natural that now the main stress of your court case has been eased you are back to grieving for everything else that is happening/has happened. For a while there the court case was the main focus and took the focus off what H has done.
I don't think there is any way to understand how H behaved when your S and his wife came over. I'm so sorry it put a sadness on your time with them. He could have invited you out of guilt, or because he thinks that is what he should do, or it could be because he wants to try to start reconnecting, or it could be none of those. We can't understand their craziness while they're in MLC.
It is so terribly confusing and draining. Is there something you can do that was working before the court case to help get you through this rush of feelings? Take care, sending lots of hugs your way.