One of my sisters-in-law has a big birthday coming up and her husband is trying to organise a surprise party for her, which involves arranging somewhere for their two primary-age children to stay the night.
My husband (SIL's brother) and I are obviously invited to the party, but since we also have 2 primary-age children and all the people we would normally be able to ask to babysit our children overnight are going to this party (I'm an immigrant and my family live in a different country), I'm not going to be able to go. Of course my husband is going to the party because it's his sister's birthday.
Since I can't go anyway, I offered to have my kids' 2 cousins over to stay the night. We live in a different town about 30 minutes away so I know this isn't the dream solution but of course I want to help.
My husband's other sister is also helping with organising everything and suggested to BIL (birthday sister's husband) that I would go with my kids and look after all 4 children at FIL's house instead, because he lives in the same town as the birthday sister.
I don't want to. I don't particularly like staying over there. It's not that clean, especially the bathrooms. The bedding is ancient. I'd just really prefer to be comfortable and relaxed in my own home. I don't want to have to hang around in FIL's house for my husband to be ready to go the morning after a party I didn't go to.
I said I wasn't really up for that. I'm happy to have the kids at mine but not at FIL's house. My husband's other sister I think is annoyed at me. She is making comments like people have to take one for the team to make things work. I understand it's important for the siblings to make this party a possibility, but I have offered the help I'm willing to give. She's making me feel guilty because I love my husband's sisters and I don't want to be difficult for no good reason, but I did think I'd already made a helpful offer. AIBU?