After Stardust’s accident, the fights between Starlight and Applejack increased, they really couldn’t bear to be close to each other anymore, both of them blaming the other. It came to the point where Starlight left Ponyville and went to Canterlot instead, she left most of her assistants to take care of Ponyville in her absent. Most of their children went with Starlight, because they worked in Canterlot, Forest Fae and Crescenta usually stop between Canterlot and Ponyville, but Crimson never liked the farm that much. Stardust lives with Applejack…mama Starlight doesn’t visit him that often anymore.