Girls, why would she first mention her fuckbuddy to me as her "new boyfriend" in front of the others?

but as soon as she got to know I was actually jealous, she told me that it was nothing serious? Around the others lately she's joked about plans of having sex with me, but I didn't act on that since she had and still has issues with her kid's dad.

Girls, why would she first mention her fuckbuddy to me as her "new boyfriend" in front of the others?
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