The fact your sister knew you were going to say that shows she is able to stand back enough and realize how this looks to the world. That is some progress. She needs to know that where there’s smoke, there’s fire. I’m shocked with his past restraining order that him landing a woman in the hospital didn’t merit stricter reprisals from law enforcement.
One of my kids uses a marshmallow theory. Throwing a marshmallow at someone won’t hurt them. But dumping a billion on them will kill them. Facts are like marshmallows.
Eventually she will stop interpreting every fact in his favor. But like my ex MIL, that day will only come when Restraining Order Boy crosses one too many of her interior boundaries.
I have to say, usually this kind cheats. They get bored quickly and when the new wears off and the old shines through they go lookin’ elsewhere. Your sister hasn’t even celebrated her “first anniversary” with him. He has many chances to screw up.
That usually opens women’s eyes. Because that kind uses other women to control the victim. “See how quickly you can be replaced. If you don’t do what I say, I’ll dump you and replace you by this time tomorrow.”
He already shows no self control with his temper, and apparently he has drinking issues. Not hard to believe he has that wonderful trifecta going of temper/substance abuse/womanizing.
The OP needs to be there to help her sister when the truth comes out and can’t be ignored any longer. The hard part is keeping your mouth shut and letting her realize it on her own.
I’m going through this with one of my children and a bad boyfriend situation that has her totally estranged from me. Only she can realize he’s not Mr. Wonderful. She can’t see that he is just like her father in many ways. On a few occasions I’ve seen small thumb-shaped bruises on her arms that make me wonder if he grabbed her too hard. She never knows how she got them. Tee hee.