Why not set up FWB situation with her outside of the shop? You don't have to date each other or be in a serious relationship. Just hook up with her for sex at her place outside the shop and see where it leads. You two have a spark and that is a good thing. If she becomes your FWB you can still see other hotties in shops. Is this WL Asian? One word of caution if you see her outside the shop don't get her pregnant. But in your shoes I would def see her in private away from the shop. The sex would only get better.