Tywin, Aerys, Joanna

My sister is really big on the theory SPOILERS that Tyrion is really the child of Joanna and Aerys making Tyrion the third head of the Dragon. Dany s mother died in child birth and so did Lyanna (Who I think is Jon Snow s mom). Joanna died in child birth as Plot: Twyin is married to Joanna and is in love with her. They soon have two twins, Ceresi and Jaime. Soon Aerys becomes obsessed with her and rapes her. She dies in childbirth while delivering Tyrion. Cast: Christopher Eccleston