If this ain't the right spot for this I'm sorry.

I have complicated situation going on, I need help finding legal support or advice for my brother.

I'll try to keep it short and sweet.. But I'm feeling really bad for my big brother.  He hasn't seen his two sons since August because his ex-wife is pulled some power moves to keep a restraining order agents him.   

This woman took the house my  brother bought and fix up for his family after they divorced. He didn't fight it.  He just wanted a stable easy marrage exit with out putting stress on his kids. I've never seen 2 people so civil for the sake of the children.

fast forward  I just talk to my brother today and I can tell he's hurting.  I've never seen him like this. I'm really worried his ex-wife is going to take this farther then he can handle. I'm tempted to ask her to stop but it probably make it worse..   

My Older brother is the strongest guy I know.  I've witnessed him go through some awful painful shit.  Hes had surgeries, he's been in accidents, had more surgery, recover with a Halo neck brace bolted into his skull.  My brother has been though more than anyone else I know, and he is really a walking talking miracle to be alive today.  And only thanks for it God every day.

He's used to have such a positive outlook, for everything. 

It's breaking my heart thinking about it. My big brother is solid like a rock but since his divorce he hasn't been the same and it only getting worse as the years past.  

Another factor is my Mom, (The boys Grandma) she hasn't seen her only 2 grand children in months because of pending court shit..     this is especially difficult for her because she is loosing her sight drastically.  Her health isn't very well either.  She loves her grandkids and misses them terribly.  She is missing birthdays and holidays, while the boys mother suggested "Video calling" from now on..  with a blind women. 

It makes me angry. My brother ex,  She really strategized her game. She is remarried to someone with money and has everything she needs to call all the shots...

She really became an unreasonable party and is taking full advantage of my brother.  He's not lawred up. He can't afford it.     

I'm just worried that eventually she's going to take my nephews out of state to where we'll never see them.  

I'm sorry for rambling... I know my brother's not the only one who's gone through something like this. As a father in the state of Arizona, what are his options? what are the grand parents rights?  Is there a way I can help?

Any input is appreciated. 

Thank you.