No you're not being sensitive. your internal alarm bells are going off indicating she's trouble. Heed your gut instinct. Freeze her out and distance yourself from her. I'd tell you to tell her to go to H**L, but sometimes vipers like this woman can take that as fuel and use it against you. So don't go that route. Just freeze her out. Always be too busy to talk to her or go anywhere with her. By doing this you're taking away her target, yet she can't use anything against you. And anyone who says rude things to you in front of other people is a true piece of garbage. There will never be any doubt about that.