Stitcher learned his job as a sewer at Raritys boutique before he moved to Manehatten to work in a local dress shop. After a while he opened his own shop there and is quite successful with it. Now he came back to Ponyville for a few weeks to meet his old friends and help Rarity with her business. While they design a new dress, he finds out about Raritys little secret and other things…

Implying bondage and wipes. I tried to make it a little romantic, though.