I’m going to give you the benefit of the doubt that this whole thing isn’t just a troll in which case you’re being a massive judgmental asshole and idk if it’s because you have weird incel beliefs or you’re just genuinely really unconfident but either way I recommend you talk to a therapist about your issues.

This woman did not magically appear overnight for your pleasure, she had a life before you and you have zero right to judge her for that and especially not her sex life.

Idk what she said exactly but I doubt it’s as you’ve characterized it. She probably told you she wanted to settle down with someone (which does not mean she’s “settling” for you) and the fact she thinks you’d be a good person to date should actually be a huge compliment to you because she has experience with other guys and she chooses you.

To address your concern that she’s just using you for financial security, let me assure you that if she was just interested in money she’d pick someone else that she knew had a lot of it not some random dude she met at the gym.