Is it ok to text a coworker married woman, is it possible she likes me?

Firstly, she is married and works under me. Seemingly throughout the day we text like old friends. Is this off limits if she's married and im her superior in the office? We banter back and forth, she remembers everything I say and listens to every conversation I have with someone. Is it possible she likes me?
Is it ok to text a coworker married woman, is it possible she likes me?
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