What would you do?

I've been invited to a family wedding. It's my husbands side of the family, so I dont neccesairly mind if I miss it. It's his aunt, but she is the same age as him (around 30). Children and babies are not allowed at the wedding. I understand. That's not a problem. Yet I have 4 children and am currently pregnant again and will be around 6 months at the time of the wedding. The youngest child will be 12 months. I am cosleeping with the youngest. I've told husband I may not be able to attend the whole of the wedding. Starts at 12 pm but to get ready and leave etc... I would have to leave the children with my mum either in the morning or the day before. It's tricky for me as right now my youngest is verryyy clingy. I dont mind. They were all clingy at some point, but now not so much. She still gets bf to sleep and will probably do so at that age. I breastfed all children till around 20-22 months. So she's got a. Way to go. She does not take a bottle. Even though I'm trying to get her on. My husband wants me to stay all day and into the night at the wedding. I've told him I may have to leave. But he doesn't want to. My mum is saying I should come back to put baby to sleep as that's all she knows, and it's not fair on her. Which I understandthat too. Plus, she'll be watching all the children ages 3-12months and trying to put that 12month year old to sleep without me. I think she's a bit worried. What would you do in this situation. I told my husband I could attend the ceremony and then leave. Would you stay away from your baby for the whole day....I don't really feel comfortable doing that, but at the same time, I don't know what to do