Another woman trying to take my husband

How do I deal with another woman trying to take my husband. Well, I'm in an academy for work. Me and my husband are doing it together. I have a problem with a woman in our academy class that tries to steal my husband little by little. I'm not worried about my husband because he doesn't talk to her or try to interact in any way. I can't make a scene because it's work and I can't get fired over something as pointless as another woman. She tried to put her shoulder on his arm etc. but, what does bugs me is my husband doesn't say anything about it. We are fighting over it and nothing is getting done. It's affecting my marriage and I don't know how to go about it. So, please tell me how I can either get over it or what to do about this woman.