I can defintely agree with the others that this is a pretty difficult situation, actually I think it is quite cheeky of the management to have a "can't say no" policy to events which take place on weekends and during "free" time hours. Certainly I would agree with the suggestion to put in place a roster or some kind of arrangement to ensure that everyone does their equal share, but in the meantime maybe you could look and see what alternative jobs are available in your field? It could at least help to cope in these confrontation situations if you know something else is out there. In many jobs being so dedicated would be an asset but in this case it sounds like you are having to work way too hard, and it would be difficult to change your situation "I don't have any friends outside of my husband. In my closet, I have very little "non-work" clothing. Work is my life." with such complicated work demands.
best of luck and don't take the disasters personally!