Army question for spouse?

I am a disabled husband with an awesome Army wife of 11 years and two great kids under 12 years old. I take meds for OCD/ADHD/PTSD and do quite fine. my parents and my wife's parents are not so nice. it has been insinuated by both grandparents that they might try to seek custody if my wife is ever deployed, because I am disabled. yes this is a very mean thing to do, but they are very selfish people set in the old ways of the male/female household roles. this is one of the reasons my wife insisted we move away last month to another state. I really hope the Army would help us if this transpired. we are new to this military life and any advice would be greatly appreciated.