@someonej,
Doesn't matter. You dodged a bullet.
Why the HELL would she feel any need to be possessive with someone she barely knew, and ask repeatedly who was with you -- during the day and presumably wearing work clothes, ferchrissakes.
You had spent a total of less than 24 hours together by then, probably closer to less than 12. She had zero reason to consider anything at all 'exclusive' or whatever for a long,
long time. Her sole question should have been something along the lines of, "Was I mistaken, and you're married?"
And you would have said something like, "No, I'm not married. She's my business partner, Linda. Now, where would you like to go to dinner?"
And that should have been it.
If this gal couldn't let that go then she is one scary human being and you are
lucky to be seeing her in your rearview mirror.