Signs of monkey branching?

My girlfriend has picked up some new hobbies that a guy she’s been talking to over text does... they talk daily and she’s talked to him about intimate things like past sexual experiences that went bad... nothing in too much detail. Anything this guy likes she also seems to like.

She wants to hang out with him with her friends at the clubs and drink. He’d be the only male there.
Signs of monkey branching?
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