I don’t think making stuff up is specific to women or is “normal” for women. It’s not a gender specific way of communicating. Not sure where you are going with this.

There could be many reasons why this person makes stiff up. Want you to leave her alone or isn’t interested to share with you? Or they might have some other agenda.

How close are you to this person and what’s the nature of a relationship? I mean if my husband made up stories I’d be concerned. But if a coworker tells me they went to ABC place but in reality they went to XYZ then I don’t really care. They don’t have to tell me.