Scenario: Sugar Cube Corner had a huge catering order, and they needed a little help. So, Pinkie called on Joe to prepare one of the requested cakes. (A sub-contractor deal?) Anyway, Joe is delivering the cake, and Pinkie is amazed at his work! She thought he only did doughnuts!
I'm not sure this is grounds for a ship, but it could definitely be the start of a lasting friendship, and certainly a good professional relationship.