Bridesmaids after the Wedding

So I’m just curious on everyone’s stance. This isn’t to start arguments, I’m just curious where everyone stands.

After the ceremony is done, and the reception is over, how long are the bridesmaids supposed to answer to the bride?

I personally think that once the reception is done, their duties are over. You can’t ask, or demand, they do anything else.

We we are having a brunch the day after our wedding for out of town guests, and I told all members of the bridal party, they are more than welcome to attend, but I don’t expect them to be there. Our wedding is on a Monday, and I’m not going to ask our bridal party to take off more time than they have too, especially since it is right before Christmas. The brunch is 100% optional.

But there’s a BM in my wedding who is agetting married before us (by about half a year) who has told us we have to stay at a hotel all weekend long for bunch and their honeymoon send off on Monday. (Her wedding is early Saturday afternoon.) I don’t mind staying into Sunday, but FH doesn’t want to stay until Monday afternoon for their honeymoon send off. (He is a groomsman)

So, what day you? Are your BM’s free birds for lack of a better term after the reception ends, or are they still responsible to the bride and groom until they leave for the honeymoon? Or even after they come back from the honeymoon?