<human>: Can you summarize the given text in a few sentences?

Okay, where do I begin?

My brother has been married to "Sarah" for about 7 years now. They have two children. One is the biological son of my brother, the other is not his biological daughter. They met in the army when she was pregnant with her, they married, and he legally adopted the daughter. 

Anyways, Sarah is a very stubborn person who always wants her way and isn't the nicest to my brother/is demanding. He in return gets mad at this and they fight a lot. That's the extent of their bad marriage. She is going with the claim that he is "emotionally abusive" when she is just as "emotionally abusive" to him. She puts down him in front of the kids, in front of family, etc. 

Here's the story.. back in August she decided she wanted to go to nursing school to get her degree... ok, fine. My brother is a police officer (veteran of the army) in a nice city (in a college town might I add), they had a nice house, etc. She can go to school there, right? Wrong. She decides to go to COLORADO (when he is in midwest) where her family is and pay out of state tuition to get her nursing degree (2 years). She took the kids. She is living with her sister and her husband and their 5 kids. 

Now, Sarah was supposed to come back to the midwest for the holidays (always been the plan) but instead said she didn't wanna see my brother and is not going to come anymore. My aunt might drive out to colorado and get the kids. As a result, my brother said he wants a divorce which is understandable. 

I don't know, I don't want my brother being screwed over in a divorce (something I think she was pushing for and waiting til he finally broke). Do you think he will get screwed? He's not a bad dad, the parents just dont get along (mostly her fault, imo-- though she'll claim the reverse and victimize herself). 

I can give more details if necessary, just ask.
<bot>: Brother has been married for 7 years, wife moved thousands of miles away and took the kids, won't visit for holidays, brother asks for divorce.