Excuse me but i strongly disagree about "calling them on it". No adult has the right to demand that their parents explain the intricacies of their marriage. She could ask them, but demand NO.

As far as well "you have to live there too" WTF? Artchic is a 30 year woman. Her parents are kind enough to allow her to live in their home. This is not some kind of entitlement.

If therapy is required well then get therapy. But I think respect for the parent's privacy is in order too.