Ok I will give a little more info on her. I know her and her roomate (a guy) so I am over at there place pretty often and I can occasionally sneak into her room from time to time.
She is late 20s, in pretty good shape (runs a lot), and she is really nice and seems like a good girl type, but I have seen quite a few guys flirt with her before so I always wonder if she has another side to. She has a BF but I know for a fact he wasn't with her the night she was wearing that red thong. She was out with her friends for a girls night out. Which is why I thought it was so fucking hot she chose to wear a tiny thong with a matching bra and high heels!