He's always been in love with you, really. Ever since you were children, he's been in love with the way you were free, the way you didn't care. You would fly off on your dragon, you would run through the gardens, all with a big smile on your face. He wasn't even envious of you... he thought you were a breath of fresh air. So different than anyone else in the Red Keep.
As the two of you grew, his love for you grew. Yet he never asked you to marry him. He didn't want to take you away from your freedom, from your peace. He didn't want to tie you down and force you to have kids. He just wanted you to be you.
So now you're both nineteen. You're sitting in the gardens, a warm summer breeze blowing through your hair. You have a canvas and paints in front of you as your work was slowly coming to life.
Aemond walks up behind you, admiring your work. "A beautiful day for a beautiful painting," He remarks.