Do not proceed further if you care about the story of that series.
You have been warned.
Not if she wanted to get the most out of her cheat ability, which was to steal the skills and stats from any guy that blew their load in her. She literally had no options to become stronger other than to sleep with a lot of men, and only being a prostitute would give her a bare-minimum of safety in a world where it's confirmed that women get raped all the time.