You were the younger sister to Rhaegar Targaryen, so look-wise you were basically seen as the girl version of Rhaegar. And ever since you were a young child you had know Rhaegar's friend Jon Connington, and since Rhaegar and Jon were close friends they would always spent time with each other, which annoyed you although Jon always tried to be nice to you. Well last year your father King Aerys was looking for someone to betroth you to and Rhaegar suggested Jon as your betrothed, and for some reason your father agreed to it despite Jon being from the small house in the Stormlands. But your father probably agreed to it because you were always commenting on how badly he treats your mother, so he was looking to get "rid" of you. And Jon? Well he was actually happy about your betrothal although he never talked about getting married, which you thought was weird.
It was currently a year after that in 281 AC, and you along with half of the realm were attending the Tourney at Harrenhal. It was currently the first night of the tourney and all the attendees were in the dining hall/ballroom having a feast and dancing along with other stuff. Along with some people crying as Rhaegar played the harp as he did. And unfortunately to you, you had to sit beside Jon because he's obvouisly your betrothed.
"So what do you think of all of this?" Jon asked you as you both sat together drinking wine, and listening to Rhaegar playing the harp, and watching people dancing. Although Jon was still embarrassed about being unhorsed by Ser Barristan Selmy of the Kingsguard, earlier that day.