I feel the need to clarify why IT ABSOLUTELY DOESN'T MATTER WHO THE FATHER OF RHAENYRA'S CHILDREN IS:
Rhaenyra is the heir. The line of succession passes through her to her oldest living child at the time of her death.
This is DIFFERENT THAN WITH CERSEI. The line of succession didn't pass through her at all; it passed through Robert to Robert's oldest child. It therefore really mattered that Cersei's children weren't Robert's.
ALSO PLEASE STOP CALLING RHAENYRA'S CHILDREN BASTARDS. Yes, Harwin was the baby daddy. No, that does not automatically make them bastards. All her children were claimed by Laenor and legitimized by him. He knew he wasn't the biodaddy, but he adopted* them all anyway and MADE THEM HIS.
This is why -- whatever Alicent wants to infer -- Viserys and Rhaenyra and Laenor and Corlys and Rhaenys and Daemon and Laena DON'T GIVE A FLYING FLIP that the baby daddy isn't Laenor.





















