to prove his origin he needs fire as Targaryen is unburnt, since he is cultivating his blooline is also upgraded and granted him an affinity with fire and became unburnt like Targaryen, he took a torch and goes towards the room of Ned stark and Catylin.
he knocked on the door and Ned Stark opened and saw jon, he frowned while jon said," I want to talk to mother Catylin", Ned stark is nervous but seeing the kids determination he sighed and opened the door, Catylin is there with a big belly indicating Arya is going to be born soon.
Catylin looked John who is holding a torch with hostility while jon has a hurt eyes and said," tell who am I really? I'm not your child right?", he said and turned towards Ned stark who is in a panic and asked," w-w-what do you mean? your my son", Catylin immediately caught there is something wrong and asked," tell me who he is really Eddard stark".
Ned stark sighed and said," he is my bastard son", but jon placed his hand in 5he fire of torch, Ned stark and Catylin are stunned but then nothing happened to the boy, he didn't even scream and took his hand off the fire, his shirt sleeve is burnt but his hand is completely alright.
Ned stark immediately panicked while Catylin murmured," Lyanna, Rheagar", jon turned towards Catylin and asked," although you don't want to talk to me, please tell me my origin, am I really the child of Ned stark or am I the child of Targaryen", Catylin looked at boy with guilt, she didn't even consider someone who is rightful heir to the throne a human.
she turned towards Ned stark and glared then asked," tell me the truth Ned, who is he really?" , Ned stark with a long sigh and wet eyes said," he is the child of Rheagar Targaryen and my sister Lyanna stark", Catylin trembled while a notification sounded in Jon's mind which brought a smile in his heart but he is serious outside and said," thank you, I'm leaving winterfell tomorrow in search of my family who escaped".
Ned stark yelled at him," are you out of your mind? you'll be hunted down by Robert baratheon, I promised my sister to look after you, I'll not allow that", but John just replied," oh! you look after me with so much care, giving a child broken things and torn clothes, food that is overboiled or undercooked, galres and disgusting sights from the people you look after me very well uncle, to the point that someday a man may kill me with a reason saying,' you're a bastard that shouldn't exist', and you can even made a dog of house of stark, isn't that right?".
both Ned stark and Catylin are stunned for a second as they couldn't believe a child saying those words, and they're now looked down as they're guilty, jon sighed and said," whether you agree or not, I'll not be a bastard child in the eyes of others, I'm leaving winterfell and whether I die or survive will be my own choice, I'll not live as dog to someone who can't even tell the child his origins".
Ned stark clenched his fist but he couldn't say anything, Catylin has tears while remembering how she used to treat him, he is right he deserves a better life and Catylin spoke with determination in her eyes," jon, we're sorry for all the things done to you, but from today onwards I promise I'll take care of you like my own child", jon just replied," like what like a promise uncle did to my mother and introduced as a bastard and trained me to become a dog".
Catylin opened her mouth to say something while Ned Stark nit his lips, they lowered their heads and became silent, then after a few seconds Catylin spoke again," okay don't believe us, but if you leave now you can't survive outside, stay in winterfell until you grow up, or atleast until you turn 15, then you can choose to stay or leave in this time, I'll
fulfill my promise, how about that".
Jon thought for a few seconds and said," fine, but I'll leave the moment you broke the promise, and you can't stop me", Catylin nodded while Ned stark looked away from Jon, indeed he is feeling guilty in his heart towards his dead sister, jon spoke," what is my real name", Ned stark replied," Aegon, Aegon Targaryen, that's what your mother called you before she died".
Jon then asked," I want to see her grave tomorrow", Ned stark nodded and jon exited the room with a smile, he saw the 2 notifications and went to his room, then received them.