Comments of chapter undefined of The Fastest Man in Game of Thrones AU

wtf?? So Daenerys is Ashara's baby instead of Rhaegar's little sister? I get it, it's au but the fuck? How did he even know that Daenerys will be born from Ashara?? He only knows about the original story where Daenerys is the daughter of the queen who was born in Essos after her escape from westeros. How did Ashara even had a baby with a Targaryen?? She was had sex with a Stark but given birth to a Targaryen?? How does that make sense???