When a girl calls you "hubby"?

She and I have been playfully teasing and flirting with each other the last month. I liked her 2years ago but missed my chance. She also has a friendly personality. She's hit my butt before but her guy friend also.

I asked her today before she left when are we going out and she told me to text me and we will plan something for next week. I let her know I'm serious. She said bye hubby and put her hand out while I held it while she walked off.

Yesterday while we were jokingly texting she said "not even bro" and jokingly called me bro once before. The thing is I asked her to do something for me and she thought I said "bro" and seemed surprised.
When a girl calls you "hubby"?
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