Your mother place herself between your father and yourself, before the King could truly attack you, or say anything that could have fractured your mind, weakened by your still recent transformation, and turn you into an evil dragoness.
"Did you forget, love, why your crown look like a dragon's horns?" she ask your father, putting a lot of venom in the ‘love’ word. "First, remember that you're only king because a woman can't inherit this kingdom's throne, that when you married me, only daughter of the previous king, becoming his heir, you swore to protect the county's traditions, one of which is to never attack or otherwise provoke a dragon unless we either have proof they planed to attack us, or already did. To always welcome benevolent or pacific dragons."
Then, glancing at the nobles that had taken refuge in the throne room before your rapist forced his way into it, she declared "By this kingdom's laws, when you publicly declared your hate of all dragons, you abdicated all right to the throne. Under normal circumstance, the royal guards would already have killed you. You're lucky! Since there is none of them left, all that can do right now is to banish you.
… Oh, and please, let your crown and armor behind before fleeing, dear those were forged using my ancestor's scales, after all."
"Your… Wait, WHAT?!?" Eloquently reacted the former king.
"Did you forget how this kingdom was founded? It all started with a simple city-state, our current capital city. One day, the young king of said quaint little state was raped by an evil dragoness, with the kind of result you might except. The legend say it's his love for the Queen, his wife, that stopped him from being an evil dragon. Instead, he slew the responsible of his transformation, and used his increased might to protect his city."
"His ability to protect it soon became legendary, so much that all the neighborhood wanted to sear feudality to him. But there was a problem, the dragon-king was too young to have any children yet and he was really hesitant to try to make some with the Queen. Wouldn't that turn her into a dragon too? But said queen claimed she didn't care which species she was, as long as she was at her husband side. That's how we know only rape can turn a human into a dragon, not consensual baby making, by the way."
"In the end, he accepted the allegiance of the neighboring lords, thus creating our kingdom of Amor, this name being another word for ‘love’. His descendants were as humans as their mother, but somehow inherited his magical might making them powerful mages. Being a dragon, his life was rather long, largely outliving his wife and children, but he still governed and protected his kingdom, until another dragon an evil one slew him, making my father inherit the throne."
"An evil dragon that was, ironically enough, just killed in this very throne-room, by our oldest children, just after raping them."
To your astonishment, while your mother told how the kingdom came to be, the nobles restrained your father and started to his armor away, taking great care to not damage said armor, but clearly not having the same respect for your father.
Apparently, the queen saw how those happening confused you. "Don't look so confused, daughter. After all, you should know that, by all the political weddings that happened between our family and the rest of nobility since the founding of our country, all nobles are related to us one way or another. And our family take very seriously maters regarding our relationship with dragons! As does most of our subject, for that mater.
… I shouldn't have married an outsider… I… I suppose my love, combined with how he dashingly rescued me from an evil dragon, blinded me…"
Shaking her head to banish her funk, the Queen address the nobles. "Once you finish taking back the sacred armor from that thing and threw the boor out, could you take leave ask a maid to bring fresh clothing? You remember what our ancestor always said about the first time he used his magic to take human shape, after all." She marked a pause, and added "Oh, and ask for my other daughter to come here."