So here s the Sunset shimmer family in one huge pile, lots of kids as you can see. yes, Sunsest Shimmer is Single in my verse. But both of her relationships ended on good terms. fire streak went to marry lightning dust but divorced on bad terms due to lightning overworking her daughter to become a wonderbolt and defeat rainbow dash and her children. Fire streak couldn’t take it and they would get into arguments due to lightning dust. So fire streak kicked her out of his home, and only has his daughter staying with him. Lightning dust is somewhere else. Flash fell for troubleshoes and went to twilight for help, and flash was turned into a mare and they made 2 rowdy stallions. The next time, they made a hyper jolly mare, and last they asked but was surprised of what they got. A unicorn. but they love their little ball of magic either way.