The bards will say that it was a great and fantastical love story to rival the ages. The bards are full of shit. It was a quiet affair, gentle and soft but there, and it started over a bottle of Stros M'Kai Rum. He had been grumbling about having to walk all the way to the Blue Palace and she had breezed into the inn and offered to do it with a smile The bards will say that he fell in love with her in that moment, but he didn't.
He fell in love with her when she came back, ordered a bottle of Surlie Brothers wine, and asked him shyly if he wanted to sit with her. They talked and talked until dawn broke, and they were both so tired and so drunk and they stumbled up the stairs and fell into bed together, laughing and giggling. They fell asleep mid-story, curled up like a couple of puppies together.
After that, the Dragonborn stopped by Solitude often. Sometimes she would bring trinkets from her travels for him, and other times she would limp into the inn bleeding and bruised but so very much alive. She didn't fall in love with him until the first time he tended her wounds. The next time she came to Solitude, she had an amulet of Mara around her neck. The bards will tell stories of a magnificent proposal meant to bring tears to your eyes. The bards are still full of shit. The proposal was a quiet, casual affair, and they walked to Riften together.
She was not the Dragonborn to him. She was just a woman. While the Dragonborn carved out her path in Skyrim, Izra made a home with Sorex. She took a year off of saving the world to have her daughter. That year was a good year, one of her favorites.
After the world had been fixed, the Dragonborn would retire. She would live out the rest of her life with her husband and her children, and anyone who saw the laughing woman swing her children into the air wouldn't recognize her as the hard-faced woman who had saved the world.
The bards will say that the romance was exciting and breath-taking, but the bards are full of shit. It was a quiet love, as sure as the ocean beating against the shore.