This girl I used to date facebooks me out of the blue, we exchange numbers and after some short texting yesterday morning we talk on the phone last night.

The entire convo text/talk I'm making fun of her etc (I'm not especially attracted to her, I figure I can use this as an opportunity to sharpen my game.) The piece in question:

Her: You've got a feisty mouth!

Me: You think so, huh?

Her: I mean how many times have you insulted me since we got on the phone? (Sort of playful)

Me: Its making the conversation more exciting for me.

Her: You used to be so sweet.

Me: Yeah but I know how that worked out for me, I'm sweet with the right girl.

Her: That's whats up

A little bit after that she said she'd call me back as she has to work at 11, wasn't really concerned about that part but what do guys think? Anything I could have done better? Anything to keep in mind going forward?