Lady in denial

Love?

There has been an ongoing love/hate relationship with my next-door-neighbor (my sister) and her husband for several years now.  She married this dipstick who resembles a large spider monkey and the fists have been flying ever since.  When they first got together, I told her he was a control freak and an abuser, but did she listen?  No, of course she didn't.  Instead, she moved in with him after she received a 48,000 dollar settlement and the two of them got married.  Mind you, he never asked for her hand in marriage until he found out about the money.  Huh, sounds fishy there.  Once they were married, he insisted she pay off his mobile home of which he still owed several thousand dollars on, but what he didn't know was my sis is a shopper and before he knew it, she had spent nearly all of it, but she was not all to blame.  He spent his fair share to.  Then they were broke and all of a sudden my sister just wasn't a good enough wife.  He told her (in front of me) that she needed to conform and submit.  Oh, hell no he didn't!  It was all I could do to not cuff him upside his ugly head.  Conform to this, buddy. 
Well, they began to fight for the majority of the time and he insisted she get rid of her kids because he had NO room in his life for them.  The kids soon went to foster care, not because my sister got rid of them, but because their biological father with a whiskey bottle permanently fixed to his mouth and a very low I.Q did not take them to school for the whole month they were in his custody. 
My sister fought for months and finally regained custody of all her kids, but her husband quickly messed that up when he hit my nephew while my sister was having a seizure.  When she came around, she found that she was bleeding form her forehead because she had hit her head during the seizure, so she called 911.  The whole time she was bleeding, calling 911 for herself, and waiting for help, her husband and son were fighting it out, completely forgetting she existed. 
Because the police had to show up at the scene, her controlling, abusive, spider monkey husband was arrested and wound up spending a year in jail.  He told her it was ALL her fault because she was a cop caller and nothing but a B$#%^.  Well, now here we are a little over a year later, her husband miles away in another state, and I'm thinking the drama is over.  Heck no it isn't.  My sister is now getting emails and I.M's from the louse, first asking her for a divorce, of which she had already filed for, but now wanting her to fly out to see him.  Holy crap!  I can't wait to see what happens next!  I swear if she takes off to see that freak, I'll flip a wig!