I read a FanFiction a long time ago where Regina was stuck outside of storybrooke (she was banished there I think) and she and Emma meet up at the border at night and they start falling for eachother, the snow and charming find out and react really badly.... but I can’t remember what it’s called, you think you might know it?
That one is A Fine Line by hunnyfresh :) https://archiveofourown.org/works/719105/chapters/1332707
Still a classic!