She was very tired, and she was in so much pain that she wanted to sleep forever after the death of her latest rider, Laena.

Yet she lived on, even as her last comrade, Balerion, died of old age and time, as she grew larger and larger, almost matching his size, and as she weary of watching each of her riders die, Visenya, Baelon, and most recently Laena a young woman that was die Infront of her own eyes, with the pain of this loss caused her to reject both Aemond, the young boy who tried to approach her, and Rhaena, the daughter of Laena the rider she lost, who tried to claim and bond with her.

With this refusal, Vhagar remained without a rider until two years later, when she suddenly awoke from her nest along the coast of the Narrow Sea and flew her massive form straight towards Dragonstone, as if something was calling her, that place made her found you in the arms of your mother Rhaenyra, while your older twin brother Aegon was in your father arms Daemon, and it was the same day that she claimed you as her rider, and it made her feel that she was no longer weary anymore.

So it's only natural that in the present day, 132 AC, her giant body is lying on the beach of Dragonstone with your four-year-old body cradling you above her snout, and she loves and protects you enough as her own dragonling, okay, although this is quite scary for others to see a giant dragon that is ferocious, has killed and eaten hundreds of times and has been through wars like her with a child like you anyway, and yes, she doesn't care that she's messing up the Green Council and Black Council's annoying situation because she doesn't care about the humans' annoying mess either.

Oh, and your family was both happy and shocked because they didn't think Vhagar would come to claim you like that, especially in a situation where you were just born, even though Daemon is still proud until now.