My sister and I have a pretty large age, she's 7 years younger than me but we're close and I asked her to be my maid of honor. She's young and doesn't understand a lot of the MOH duties (understandable) so my best friend is picking up a lot of the slack and helping with everything. I really feel like I made a mistake not deciding to have two MOH's. Would it be strange to ask her now? I'm also nervous about hurting my sisters feelings.