I hope this isn't hard to follow and long! Ill make it as quick as possible. I need some good advice for a work friend, and I want it to be the right advice as she is fragile with not a lot of positive influences in her life.
Work friend, lets call her Mary, and her abusive ex lets call him bob. 
Two years ago, Mary and bob and a very Intense relationship that lasted about a year. It moved very very fast, she was in a low place and he was/is very negative.
Thier relationship was either 100% amazing, or 100% awful. He was very sexually aggressive, i think he raped her twice (she doesnt like talking about it) lazy around the house, self centred, gas lighting, verbally very abusive and a compulsive liar.
She loved him a lot and did everything she could to make him happy, but towards the end she started fighting back, verbally and once or twice physically.
It all ended very suddenly, his decision. She dealt with it well, went completly no contact and her life has gone from strength to strength, it's taken a year, but she's about 85% of the way to having her life as she wants it and her self esteem/confidence high.
Until yesterday, we find out Bob is coming to work on a project with us!! It starts in November and lasts for a year! 
It would be career suicide to drop out, make serious waves and will permantly a black mark against her name. So she has no choice but to do it. I am not sure if he knows that she will be on the project as well.
She won't have to see him everyday, maybe once/twice a week.
What should she do? How should she act? It's a horrible situation, and I have no idea what the best thing to do is. I'm not sure what he will be like with her, it could go either way! All over her like a rash or blatantent rudeness!
Help me mners!