Fire and Blood

This is set after the dragon pit meeting in season 7 episode 7, and is this scenario: what if Daenerys went to visit Cersei after the meeting instead of Tyrion?

Everyone told Daenerys she had gone out of her mind. "You might be the Mad King's daughter, but even the Mad King would never think negotiating with my sister was logical," Tyrion, her advisor, had told her. But Dany would no longer listen to what others told her. I am the blood of the Dragon. A Dragon can frighten even the fiercest lion into submission, she told herself as she walked down the halls of the Red Keep to Queen Cersei's chambers. She walked past the Kingslayer, who grimaced as he saw her. Dany smiled to herself, remembering how he had tried to slay her and had failed so pitifully. The cry of a dragon drowns out even the loudest lion's roar. Tyrion arranged the meeting with trepidation, but Dany had no trepidation herself.

A group of Queensguard stiffened and parted their way for her as she walked towards the door. Despite Dany's youth and their loyalty to Cersei, they knew that getting on Dany's bad side meant a potential roasting from Drogon. Dany knocked on the door. "Come in," she heard the queen sneer. Dany opened the door, where she found Cersei sitting behind a desk, flanked by that monstrous Ser Gregor on her right. Her dress was made of black scales that almost reminded Dany of the scales on her dragons, and she felt a sudden urge to reach out and stroke the shiny black scales. But she did not. Cersei tilted her head to the right and looked at Dany condescendingly. "Now try to convince me to follow your silly plan. I'm curious to hear your attempt." Dany stood erect and raised her head with pride "I—" "sit down, child," Cersei interrupted, with a smirk on her full lips. Dany's face flushed red with anger. "I am no child! I am Daenerys of the House Stormborn, Mother of Dragons, Khaleesi of the Great Grass Sea..." "Oh shut up with that prattle and just sit down, unless you'd like your head bashed in by Ser Gregor right now," Cersei sneered. Ser Gregor drew his sword.

This woman is vile, Dany thought to herself, but almost by some supernatural force compelling her to do so, she took a seat facing Cersei from the opposite side of her desk. Cersei was indeed vile, but during the meeting at the dragon pit, Dany could not stop examining her. Dany was used to being worshipped as a Queen, as a conqueror, as a savior. But to Cersei, she was nobody, she was a child. Dany had hoped her grand entrance on Drogon's back would startle and impress Cersei, but Cersei simply announced in an annoyed tone, "we've been here for some time," and hardly seemed to notice or care about Dany's grand entrance. And as much as that infuriated Dany, there was something oddly compelling, a sensation she couldn't describe, about being with someone who didn't worship her. Who was this woman who was unimpressed by a dragon? Why couldn't Dany stop staring at her sharp jawline and cheekbones and the lion embroidered on her full chest?

"Now that you're behaving yourself, Ser Gregor can leave," Cersei said, and nodded to the monster, who left the room. Cersei continued, "You've brought barbarians into Westeros, burned the food supply from Highgarden that was meant to feed an entire city, and even recruited my traitorous brother into your service. So I have no desire to help you." Cersei leaned towards Dany, and Dany stiffened, trying to look as composed and regal as possible as her heart raced. "But let me tell you a story. Something I tell very few people." Cersei placed her arms on the desk as she leaned forward and clasped her hands together. "As a child, myself and a companion visited a witch in the woods who was known to foretell futures. Her name was Maggy, a repugnant old woman. She told me that I would marry the King, which I did. She told me that I would have three children who would meet untimely ends, which also came true. And she told me that a younger, more beautiful queen would cast me down and take all that I hold dear. You probably fancy yourself to be that queen. But you are not, because Maggy was wrong. The Lannister legacy will continue after the deaths of my children, for there will be more than three" Cersei said, placing her hand on her stomach and arching her left eyebrow. When Dany realized what this gesture meant, she tried not to gasp aloud. "So, please tell me how you plan to cast me down and take everything I hold dear." Cersei leaned back in her chair and looked at Dany in the eyes smugly, her own green eyes flashing with haughtiness.