I kinda agree with the last post...
Okies so what happens when the relationship starts kinda sorta bumpy, is she going to seek physical/emotional needs elsewhere? But Kirsty is correct as well, in that we're human beings, and we learn through our mistakes. Perhaps she has learned that two wrongs don't make a right and she's looking to move forward.
I think only you can make that character judgement, but as for my opinion, tread lightly but be open minded.