OK, ask to see a copy of the paperwork for the braces to see who did sign for them (only the other parent or is there a second signature on the documents as well).
Besides, @wimbly11 you mentioned how your own family's finances will be constrained once you are on maternity leave. You are expecting DH to contribute to your kids' needs as well.
Compose those questions and print copies for you, DH and maybe one set for the lawyer.