I am being very petty towards a colleague at work but i am done being nice. Several months ago I invited her to a day long offsite so I could explain the inner working of our product. Everyone attended except her and she cited some excuse as she didnt think it was useful for her. Then over last two months she has rejected all my overtures. Now it turns out she’s been tasked to write a document that surprise surprise…. touches every part of the product I work on and she needs to know as much as she can. I am being very petty now and refusing to help her with anything and just asking her to RTFM. I am like throw attitude at me, I throw at it back lady.