Rarity´s been trying to teach her little sister the art of sewing for years and, thought not really interested in what she was teaching, the filly did gained lots of knowledge.And now it´s time to put that knowledge into use.

Based on this comic by AniRichie-Art:

http://anirichie-art.deviantart.com/#/art/COM-Of-Memories-COMIC-473220248?hf=1

Takes place many years after the events of the show, as Sweetie Belle is a young adult (21-29 years)