@mrmatt88 I say you made the right call for yourself. Her actions made you uncomfortable, you don't seem to have a good feeling about her intentions, and you set your limit.
As a married man, I have been the one to put strain on our marriage. Almost 8 years together now. I do my best to be open about my needs.
I think a cheater is always a cheater if they keep hiding what they want and don't communicate how they feel.