Frustrations- with FIL's girl friend

Her name is Virgina but she goes by Ginger. She is starting to bother me. She invited me to go to lunch last week. She cancelled an hour before we where to go, I'll sure she was nervous and gave herself a stomach ache. OK, whatever I was not excited about going to lunch with her.

Friday night she goes to the DV football game. It's windy and it's a little cool because of the wind. By no means was it freezing. She had to leave. So, I sat in the stands for over an hour alone.

 Saturday, my FIL offered to drive to Flagstaff to watch DV band compete. He drove more than 1/2 way there then she told him he would drive. I did not feel comfortable with her driving, she was all over the place.  We ate before going to NAU for the competition, she was so weird about paying FIL for her sandwich and only eating half, to save the other half for who knows?  At the competition I bought a program. She asked to see it 5 times, after handing it to her the 5th time I said she could hold it. After the last band preformed I went to the restroom, Sarah just happened to be headed in the same direction. Ginger came out of no where and cut us off! OK, I get sometime you need to use the bathroom right away, but not atleast say, something! Dad stopped to get gas, and while we were in the car she tells me where her hours is 39th and Cactus then precedes to tell me how to get to FIL's house from her's. Like I've never been to FIL's? I was mean could have said any number of things like - the house hasn't moved in 20 years, I've been there many times, but I said "yea, I lived there for 2 weeks" Ginger's says "Oh, when was that?", me "taking care of MOM.

It's hard for me to be nice to her, and it's hard for the kids to be around her. We are not ready to see hand holding by a widower of 6 months and the woman he is seeing and pushing on us.