Twilight wishes to become a better flyer and goes with Rainbow Dash for a series of flying lessons. Between the rounds Rainbow is learning a few things herself. While she's helping Twilight learn to become a better flyer, her own dreams are helping her learn to embrace her sweet feelings.

Second edition update with MINOR SPOILERS unless you've read the first and the comments: I took into account suggestions and went with them. The shared dream hints are stronger and there is a longer course of training. I may even write a sequel where they reveal the happenings to their friends and there'll be lotsa love.