So, I have a question on how to approach a situation with the guest list for the rehearsal dinner. FMIL has offered to pay for it. FH's parents are divorced and both are remarried. FH's step mother has three adult children from her first marriage and her son is going to be a GM. However, FMIL was unhappy we were inviting the step mother's children to the wedding saying they don't need to be there, but we stood our ground as FH wants them there. My question is for the rehearsal dinner how would you go about discussing inviting all three of the step mother's children? I think it would be rude to exclude two of her children but at the same time we can't afford to host the rehearsal dinner so I know if FMIL doesn't want them there we will have to not invite them. I'm trying to think of how we can approach the subject so FMIL would be OK with all three of FH's step siblings be in attendance.