We have booked our wedding and my groom wanted to involve his sisters in the wedding party so we decided that they would be bridesmaids, along with my sisters. 6 altogether.
Groom was having a best woman. this then went to 2 best women and now he has decided that actually he wants 3 best women. These women will be dressed in a floaty jumpsuit, not a tuxedo.
So I have said, if you are having three women in your wedding party, your sisters might aswell be on your side too.
He thinks this isn't right because his sisters should be bridesmaids as is traditional.
I think that if you are having that many women your sisters might aswell be included.
There are no men at all in the wedding part except the groom and my son who is giving me away.
So;
YABU - his sisters should be bridesmaids
YANBU - he's having three women, what's two more.
I think his sisters will be hurt that he is essentially having three bridesmaids but not including them.