I'm the MOH and also a sister of the bride. There are 4 additional bridesmaids in the wedding, including a future SIL. We decided to have the shower and bachelorette party on the same day the month before the wedding, since many friends of the bride and wedding party live in different states. Is it appropriate for the full wedding party to co-host the shower (along with the MOB) and to co-host the bachelorette party as well? How do people typically share the planning/details/cost for the event? As the MOH I was planning on taking on 50% or more of the shower costs, as well as coordinating invitations, etc. Is that typical? Thx.