Girl told me not to tell anyone about a conversation we had, even her boyfriend?

This is a girl I work with and while I won’t get into all the details, I’m 99% sure this girl likes me. She checks my location, talks to me about music, opens up about her depression, has tried to get me to bring her food (I didn’t), and a ton of other shit

Anyway the other day we were working together and she started talking about sexual stuff and it turned into a joke conversation where we took sexual acts and put them into a “freak scale” from 1-5. (Example: road head was a level 2). If this sounds like a stupid conversation it’s because it was lmaooo but she seemed invested in it

Anyway afterwards she said “we cannot tell ANYONE that we had this conversation, not a soul.” Then she mentioned that her boyfriend gets really uncomfortable with most sexual stuff

I personally found this odd and wondered what the rest of y’all thought

Girl told me not to tell anyone about a conversation we had, even her boyfriend?
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