If the guests want to wrest the check away from the host, because the host is also the guest of honor, then the guest who volunteers has to cover the whole thing. A guest can't volunteer -all- of the guests to pay for the host/honoree.

I think a person who arranges the event and orders the food also picks up the check - even the birthday person, even when people at the table insist on paying for the birthday person.

Make sure you have legal cover for what you're doing.

You don't want to be with someone who is already not getting from you what he needs emotionally.

One helpful thing to keep in mind as a retort-stopper is that you won't "win," you won't change anyone's mind, you won't change any votes, you won't make the atmosphere in the room any better, YOU won't feel any better.

Plan your own vacations when you want to, and plan a suitable combined vacation with this other family when you want to. If they freak out at your planning your own vacations as you see fit, then let them. Bowing to unreasonable demands because someone will make you pay emotionally if you don't is not a healthy option.

For me, the greatest source of frustration was trying to work with a willful child when there was something else I wanted - say, to get the child to go to bed so I could have my own time. Just the promise of the time, and feeling that promise slip away, was enough to introduce a whole other element of stress into the encounter.