You strike as the kind of guy who believes there are only saints or only siners amongst women. Any woman can be a whore or a slut.
With social media nowadays all women get tons of sexual proposals, dick pics, what have you.
Many women flirt just to get attention, not with the intention of having sex.
The smart women use that ilusion in their favour, and make money with guys who can't get it in real life. Does it make ok? Argueable. Is that as severe as actually sucking another man dong? NO. Not in a million years.
We always assign the best qualities to somebody we think we are going to be with sexually or otherwise.
Outside of that, this is not rocket science it's predictive behaviour and setting yourself up for perpetual monkeybranching. If your woman is a stripper, there is a guy at the club with enough money, status or drugs to do anything he wants. There is a price, whether you want to do mental gymnastics and deny it or not doesn't matter. She didn't just end up there by mistake, haha.
Secret FB, Onlyfans...anything that revolves around sex or relationships other than yours ... it is a huge red flag to RUN if you are in it for the long term.
Side note...I can't believe Diablo is still with the same woman.