Aegon III, aka Aegon the Younger: Rhaenyra and Daemon's first child together. Aegon Targaryen, aka Jon Snow: Yes, he comes much later, when a song of ice and fire plays out.
Eventually, it's Daemon and Rhaenyra's two sons who end up sitting on the Iron Throne, but is that for a future series? The Velaryons survive, but in recent years Ser Corlys has come to support the Greens, after falling out with Rhaenyra and being accused of treason (unfairly).
So, who is the real father of Rhaenyra's children? In the show and in George R.R. Martin's Fire and Blood novel, it is heavily implied that Ser Harwin Strong, a knight and the captain of the City's Watch, is the true father of Jacaerys, Lucerys, and Joffrey.
We haven't seen them yet in the show, but Daemon and Rhaenyra have three sons together.
“The Princess and the Queen” opens up with Rhaenyra giving birth to her third child, another boy. Laenor decides they'll name him Joffrey after his late lover who Criston beat to death right before he and Rhaenyra wed.
Rhaenyra and Daemon's Marriage
Soon after being widowed, Daemon and Rhaenyra marry each other in secret when he is 39 years old, and she is 23. Their marriage causes a huge scandal at court and another rift between Daemon and Viserys, but it is eventually accepted. The couple has two sons together, Aegon and Viserys.
But, while time may heal all wounds, 10 years certainly wasn't enough time for Alicent's wounds to heal over being lied to by Rhaenyra. We last saw her find out the truth in "We Light the Way" that Rhaenyra lost her virginity to Ser Criston Cole (Fabien Frankel).
In 117 AC, Rhaenyra gave birth to her third son, whom Laenor named Joffrey, in honor of Ser Joffrey Lonmouth.
It isn't explicitly stated in the show, but because we learn after episode six that all three boys have dark brown hair — and despite Rhaenyra and Laenor's matching blond color — it has been strongly implied that they are actually the children of Ser Harwin Strong, the Lord Commander of the City Watch.
The comes the final blow: Rhaenyra's baby daughter – whom they'd named Visenya, according to George R.R. Martin's Fire and Blood – is stillborn after a brutal, bloody labor. This is similar to the book, where the baby also has dragon-like birth defects, including a hole in her chest and a small tail.
After the assassination plot against Laenor Velaryon, which led to the widespread belief that he had been killed (though a brief scene at the end of "Driftmark" reveals that he and his romantic partner, Ser Qarl, have fled Westeros), Princess Rhaenra married her uncle Daemon, and they have had two children, Aegon III ...
Rhaenyra cradles her daughter and weeps. Though the Silent Sisters come to prepare the body, Rhaenyra wraps her child in funeral cloths by herself. Visenya is cremated on Dragonstone just as Ser Erryk Cargyll arrives with the crown of King Viserys I, and Rhaenyra is crowned queen at her daughter's funeral.
In the book, Visenya was described as being born with dragon-like defects, including scales, a tail, and a twisted body. Rhaenyra's baby did end up having scale-like defects and a malformed body in House of the Dragon, which aligns with the occasional reports of Targaryen women bearing dragon-like stillborn children.
One of the first times we see Rhaenyra as truly angry throughout the entirety of Season 1 is during the traumatic miscarriage of her daughter Visenya.
Nonetheless, Rhaenyra and Daemon's youngest son becomes King Viserys II Targaryen, with the crown passing through his line. New episodes of House of the Dragon release Sundays on HBO/HBO Max.
After a few kinds words about her cousin, she delivers further bad news — Aegon has been crowned as Viserys' successor. This news of betrayal, just when her relationship with Alicent was finally being repaired is heartbreaking for Rhaenyra who whimpers and clutches her pregnant belly.
Daemon seduces Rhaenyra in such a way to cast aspersions on her virtue so that Viserys has no choice but to let him wed his niece, Targaryen style.
The reason why Criston and Rhaenyra having sex in House of the Dragon episode 4 is so important is due to Criston's loyalties during the Dance. Eventually, Criston turns away from Rhaenyra and joins the other side of the war in service to Alicent Hightower and her son, Aegon.
During a visit to a brothel Rhaenyra and her uncle, Daemon, were swept up in the heat of the moment and began kissing. The pair very nearly committed an abominable sin, but Daemon came to his senses before he deflowered the heir to the Iron Throne.
After the beginning of Daemon and Rhaenyra's marriage played offscreen, viewers were able to return to the story to see the pair after they'd established their life together. It's obvious that in that time, the two gained an awareness of both themselves and each other.
It is only after this realization that Rhaenyra makes her first move on Daemon, instigating with a kiss after she affirms to him that she is no longer a child.
Why Rhaenyra had to marry Daemon. Rhaenyra had to marry Daemon for two reasons. The first is that she genuinely seems to love him, as weird as that is to write. The second more pressing reason is the growing threat of Alicent Hightower and her Greens.
Rhaenyra doesn't just lose her baby, but this happens in an unnecessarily long and detailed scene that could have been dedicated to literally anything else. It is a mind-boggling choice, and just the first of the violences enacted upon her in the finale.
While Daemon and Rhaenyra have been circling each other for quite some time, the finale revealed a darker and more toxic aspect of their relationship when, arguing over how to proceed against Aegon II (Tom Glynn-Carney), Daemon chokes Rhaenyra in order to get his point across.