This story is a sequel to Scootaloo's First Friend
(Takes place prior to the start of the show. A birthday present for Matt11. Proofread and edited by deadpansnarker.)
Scootaloo and Sweetie Belle have just become friends, and Sweetie Belle immediately settles on the idea of having a sleepover at Scootaloo's place. After a little bit of reluctance, the filly agrees.
For Sweetie Belle, this is her opportunity to not only find out where her new friend lives, but also who her parents are. Scootaloo, on the other hoof, is just focused on throwing a good sleepover since it's her first one.
But things will go in an unexpected direction, especially since both fillies still don't know each other that well yet.