My fiancé of 4 years wants to sell nude pictures?

I’ve been in a relationship with my fiancé for a long time now, coming up 4 years. We have a daughter and honestly things were going amazing until the last year or two, we got into a rut where we needed extra cash and finally gave in to let her sell her pictures because she wouldn’t stop fighting with me on it out of nowhere, so I let her for a while even though it had hurt me, and now it’s back again that she wants to and has gone to the extent of lieng to my face when asked what she’s doing on Twitter, it’s made me feel insecure with certain things she has posted because not only is it pictures but it is describing things she wants guys to do to her, it makes me feel not good enough in bed or as a partner and the fact that she’s lied to me twice now makes it even harder to deal with, she acts like my feelings don’t matter even when she knew I wasn’t okay with it when she first started dating me, am I the bad guy now for still not wanting her to do it?

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Update she does have disabilities like pots syndrome, I don’t fully understand it but threw out our relationship I’ve given her anything she’s ever wanted, material things I’ve bought for her without question, someone to talk to anytime of the week day or night, the argument now is I’m taking her right away from her to do what she wants with her body, and granted yes I could understand the way she feels with that but I can’t ignore the fact it hurts me and that if it hurts your partner you don’t
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Do it, I’ve always been supportive and there for her, there’s just some things that have changed threw our relationship that I clearly layed down in the beginning that I’m not okay with, she claims to love me so much and not be able to survive without me but can treat me like shit when I’m hurt talking down to me and throwing my insecurities in my face, I didn’t choose for it to hurt me it just did
My fiancé of 4 years wants to sell nude pictures?
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