Anonymous wrote:If you can... have them and sibling come over for dinner
"mom dad, you know we love you guys to death and we love hearing about the good days you have together. But if the both of you are not willing to talk to a professional, please stop calling me and sis to complain about each other."
it likely wont stop it, but at least you've gotten it off your chest, and the next time one of them calls you... and they start talking about how crappy the other one is being, the phone has an off button...
It depends on the level of crazy. My parents-both ivy grads with fancy advanced degrees considered themselves the epitome of perfection. If we confronted them like this all hell would have broken loose and it would have erupted into them fighting even more and blaming us. With them you have to take the more passive route of just not reinforcing-change subject. You could gently and politely say "I am so sorry you are struggling. I know you will figure this out or find a top marital therapist." That would have set off yelling too, but nothing like if we ganged up on them.