What if you fall in love with the "wrong" person?
^^^ seems to me you consider her a wrong person... but really, if you love her, do not accept her for what she is right now, instead encourage her and help her to change... it may appear that she had no choice but to be an escort as it may give her the financial support she needs... but considering she's already a degree holder, why not help her find a job.
You love her but you hate her other life... brad, her other life is still part of her. and you have to love that too...if you don't want regrets, do the best you can to help her change her living... she's the breadwinner, right. But you can't help her if you let her continue that way...