If it is truly someone's past and in no way their present than it should not matter.
I hate to tell you this, but if she had not had her past experiences she would not be the person she is today. So if you love her than her past should not matter. If you are lucky enough to find true love why ruin it with thoughts of what she went through a long time ago. She did not even have to share it with you but she trusted you enough to tell you. If you care what other people say about your relationship than you really have some messed up priorities.
If you enter a relationship not willing to accept someone's past than you are missing out.
I suppose if you can't come to terms with things and you can't let it go, you never will and it will eat at you.
I have parts of my past that are fucked up and I really do not want to share them with anyone. I have shared some things from my past with women I was close to and it did not change a thing in the relationship. I dunno.
I have always been told not to hold someones past against them. Now if it still is a part of their life today it is a different story. I am not a fool.
But people resort to prostitution and other forms of crime usually due to things beyond their control. I am a man. I have had sex for money, food, and drugs. I never had sex with another man or anything of that sort but I had sex with women I did not want to, but I needed the money with the emphasis being on need. I would have gone hungry, gotten very dope sick, or even lost my place to live.
That situation happens to women more than men. I wouldn't want to be with a women who had just stopped whoring recently but if she did that a long time ago, long enough to be over it, well then it really doesn't matter.
I know it is hard to imagine that for people that know me now. I have only told a fraction of even the people closest to me this. I wouldn't have told anyone I did not think would understand. I really don't care on here because if you want to pass judgement on someone online for what they did almost ten years ago, well go right ahead.
But I guess my point is if you really do love this woman and she has put it behind her, than you should be able to not even worry about it. Do you think you were the same man you were ten years ago? People do change and well if someone had sunk to that level of desperation and gotten themselves out of it than they have some rather strong character. It is not easy to get out of a situation like that.
I suppose if it fucks with your relationship today where she has issues than it is different but like I said if she is over than you should be to. Otherwise you should just let her go than to be with her and resent part of her. Don't marry her if you resent part of her because you can't marry just part of her.