This is such a non issue, she used to be/is a porn star, so what. It sounds like shes had a troubled past and is trying to straiten it out, so why not hire her to be a strength and conditioning coach, she is obviously knowledgeable in the area and that should be all that matters, what she used to do should not make a difference (assuming she is no longer making porn movies).
If I was a Titans supporter I would be more worried about her history with drugs and alcohol, especially if she is working with the under twenties, but they say she is clean so once again no big deal.