The couple reconcile with a contract that calls back to the situation that started it all in 2018’s To All The Boys I’ve Loved Before when they decided to initiate a fake relationship so Peter can make his ex jealous.
Due to the couple’s turmoil, Peter skips out of being the wedding date on the special day of Lara Jean’s father.
Later that night, LJ has a heart-to-heart with her sister, who shows her the first letter she ever wrote about Peter.
The movie suggests that the couple do have sex together before going in different directions for college, with intentions to write love letters to one another during long distance.