We have a new teammate - S - who is a contractor doing a specific function. Her function could be done by me, or another team mate, but we decided that since we had other things that weren't easily offloaded, and this function was, we'd have a contractor handle them. S is polite, very quiet, does her work and doesn't mix much with others. This in itself isn't the issue, but it does color how we interact with her - she does better with e-mails, and doesn't call or come to our desks (we all work in the same general area, no more than 30 feet from her desk).
She's been working on a project for some time, for an external (not on our team, but in our company) group. When S went out sick for two weeks, I had to step in and do some of it - there was a tight deadline involved. She's been back for a month, and is trying to finish up the second half of the project. I did the work that comprised the first half of the project in about two days - including compiling a lot of data. She could have used my data, but chose to pull her own copies, and go through the manual work again. She could have followed the (very simple) steps I used, but instead is making it VERY complicated, so that she can use a specific tool instead of just doing the work. She's spent hundreds of hours on this - I did the first (larger) half in TWO DAYS. We had a meeting today that lasted four hours because my boss had to walk her through all the issues with the data she'd come up with, line by line. In other words, she is NOT working out well on this.
My issue is, how do I handle being polite, when I really want to scream at her? I would appreciate some strategies - I've tried to just not talk to her if I can help it, but because my boss was OOO the day that she started, I helped do the onboarding for her (getting badges, computer access, etc.) and she thinks of me as her supervisor, even though I'm not. I'm also the only other girl on the team, and I think that's an issue for her - she seems uncomfortable in our mostly male workplace. I really want to like her, and she's polite, but she just. doesn't. get. it. and it's affecting both my work (my boss knows this) and my morale (which I've been trying to disguise).