Shatterbrained
I think Nova most certainly would've tried to get into her pants, so a one-night stand is quite possible. Also, if he happened to find out that she was also a fire Elementalist, he would probably make excuses to spend a little more time with her than the average person just because he likes people who he has common experiences with.
And if she was trying to nab a sweet roll Nova would probably just tell her "You can pay me for that with a date and a kiss" and wink like the horny b*****d he is.
So, I am picturing this:
Jocelyn tries to nick a sweet roll her first week cause she's broke, and Nova catches her and flirts instead. She takes him up on it (yay one night stand? your call.) and once they realize the other was a fire elementalist, they become friends (maybe with occasional benefits as she's been in town for a couple weeks), etc. I could even see her stopping by his shop regularly and playing to draw customers/use his customers to make some money. Sort of a win-win.
Sound good?