There are men out there who're turned on by the idea of their girlfriends/wives having sex with other men; some men are turned on by the idea of their girlfriends/wives being paid for sex. You're clearly one of those guys. And you're within your rights to share this information with your girlfriend and to try to convince her to return to sex work. Because your fantasies of sex work---of her doing sex work---turn you on. Again, that's fine. But you could make a more convincing case, PIMP, if you were better acquainted with the realities of sex work.
You should suck off strange men for money.