A girls asked me what color to paint her nails, but she has a boyfriend what does this mean?

I am really good friends with a girl and I like her a lot and she has been flirty with me for a few months and she recently asked me what color to paint her nails. I am confused because she has boyfriend. What is going on?
A girls asked me what color to paint her nails, but she has a boyfriend what does this mean?
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