<human>: Can you give me a shortened version of the text?

Hey guys, I'm looking for a quick advice for my mom. We are immigrants to the UK from Eastern Europe, moved here in 2006 and we settled well. This month 5 years have passed since they separated.

My parents got married in 1993, had two children- myself 21F and mentally disabled sister 19F. Our lives were full of abuse that we had to take from my father as my mother is very religious (has to obey the 'head of family', can't divorce, no career). In 2010 I tipped off my college about the abuse, Had to give a statement going back to when I was little. Father was taken to the police station for I think 2 nights (memories I tried hard to suppress), mom got to give her statement. All in all, two days later our case was dropped as apparently there was a difference between mine and mom's statement.

Happily Women's Aid organisation got involved, we lived for three months in a safe accommodation with other female victims then got a council house. He moved back to Eastern Europe and they had limited contact. He paid £5 per week for each one of us and would sometimes send money and gifts for my sister. Over the years she mellowed and is happy to go through with divorce. We don't know what to state as the reason and we see it as important as he could try to sue my mom for alimonies in the future (and me too).

What we have against him is the reports from police, some text messages that show how unhinged he is, I have emails going to last year where he admits to beating us up (and his kids from previous marriages). 

**Question:** Can my mom state the reason as Unreasonable Behaviour and expect it be successful or would it be better to say 5 years have passed the marriage dissolved?
<bot>: Parents are separated for 5 years, father has been abusive all our lives, not a lot of evidence- is there any point of naming violence as the reason of marriage ending.