She may feel stuck in the middle as you say but I don't agree that when it comes to our relationships with our AC, that as parents we are the only ones who need to act in an adult way.
If a son is old enough to be a father and a husband, then he should be old enough to act like the adult he purports to be. If you read through the thread,you will see that Elless' H never said he wouldn't go to the wedding, he was told not bother if he wanted to hire as suit
This is not in anyway directed at Elless. I can't help but wonder if, when an AC's expectations are not met for whatever reason, if the parents give in, a bit like placating a child whose having a temper tantrum, if it's any wonder that some behave the way they do.
This is what I understand to have taken place. Son wanted dad to buy a blue suit. Dad said he wanted to hire one as he'd never wear a blue suit again. Son throws his toys out of the pram and says don't bother coming then. Parents don't go to the wedding. Son complains their absence ruined his day and he'd had to tell people why they weren't there.
There could and I agree should have been a sensible conversation but the moment the son behaved like a child, telling his dad not to bother going, that moment was lost.
This sad situation culminating in him ceasing contact with his parents and not allowing them to see their GC is down to the son.