Is this an insulting offer?

I want to go to this specific spa resort with my husband next month, from Sunday morning-Monday evening. But we have a baby and I don’t want to be away from him overnight. So I’m thinking we could get a room for us and a room for my husbands parents, and his parents could babysit our baby while my husband and I go to the spa and to eat our meals. And then my husband and I would stay with our baby to let his parents go use the spa and get their meals. It makes sense in my head but is that stupid? Is it more trouble than it’s worth?