I think a lot of brides here have the same issue as you, including me!! There are no children invited to our wedding. I'm a teacher so I really like my time off from other people's children when I'm not working since my FI and I don't have any of our own. I know that I'm cutting people off the guest list for that reason alone, but honestly, I don't care. I'm not a mother yet and vacations with children is a lot to deal with.
My family is kind of surprised we're getting married in JA, but we really don't want to spend $20,000 on ONE day. We would rather spend $15,000 on a whole two weeks!
I've heard it all from everyone, but it's OUR day. We're not really considering people who really don't want to come.
I know I may sound selfish to some, but I've been kind of pleasing other people my whole life, and I'm sticking with this decision!
Good luck with your issue! I hope everything works out