Hello, didn't played it for a long time, so maybe something like things I suggest already in the game, here some stupid ideas.
1.Drug mule job, MC can agree or be forced to traffic drugs, can be connected to stewardess work, she'll have both of her holes stuffed to the brim with goods and will need to avoid suspicion.
2.MC can stretch her pussy into blown out hole, what about adding NPCs who have such fetish. They will like MC much more when find out she has loose holes, and offer (or insist) to stretch them if she's tight.
There are many camwhores like Siswet with such content, give MC option to gain fame in webcam as size queen, and add mean sugar daddies who enjoy ruining her pussy, turning it into unclosing cavernous cunt.
3.Add underground adoption service that sells kids to rich foreigners, so MC could profit from getting accidentally knocked up, becoming surrogate slut.
4.Nanny work, MC can take it seriously or start flirting with fathers to gain more money. After fucking with one of clients becomes regular, he tells about her to his friends, and her services become much more popular.
There are tons of porn with nannies, with scenes where they fuck while hiding from wife, suits well for stealthy cumdump babysitter work.
5.Religious cult with self-proclaimed prophet, it can be small village house out of town, where sociopathic dude gathered group of followers and small harem.
Unattractive MC can live there, pay smaller sum then city rent and perform menial tasks, participate in drug-fueled orgies, after getting more beautiful, cult leader chooses her for his harem, she branded as his property and not allowed to use contraception.