Why this customer do this?

So this female customer whose a regular I asked for her name the other day, I also complimented her nairs and accessories, and she modeled it for me walking back and forth. But today when she came in to the store she goes "Hey Victor!", I go "Hi". We were vibing and shit she told me she got a new job, doing sales. She then proceeds to say that she's working on music she's a dj, she pulled out her phone and showed me her making music, I enjoyed listening to hit, she was happy that I enjoyed her music, she then proceeds to say "what should I call you instead of barista", (even though she already knows my name), I then told her call me "baristee", as a joke, she giggles, then we continue talking a bit, she then proceeds to order I make her drink then hand it to her, she goes thank you I then reach out to give her a high 5 before she goes she then puts down her drink on top of the counter, places 1 hand at the bottom, and one hand at the top of my hand, I then slid my hand then place it onto my heart as a thank you I felt weird when she did that. Not going to lie.

What's her deal

The hand shake looked like this picture

Why this customer do this?
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Also as soon as I rung her up for a drink that she ordered, she goes " I don't know if you notice, but I always tip you guys, have you noticed?"
Why this customer do this?
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