On Valentine's Day, Twilight pays her Canterlot High friends a visit and finds out that they have all thought about sleeping with her. She is not okay with this.
It turns out that Sunset Shimmer's final letters to Princess Celestia before her exile were not filled with resentment or remorse. There might have been a lot more frantic running away involved. But it was definitely not Sunset's fault. At all.
Equestria is having a little problem - there are starting to be way, way too many alicorns! Sugarcoat investigates and makes a lot of very awkward discoveries - namely that it's all Cadance's fault. .