Family betrayal

Story: You had been in a healthy relationship with your boyfriend Lukas for 2 years when he suddenly broke up with you for your older sister Zoe. Your parents support their relationship but they do not know that Lukas left you for Zoe they just thought you grew apart. About Zoe: she's older than you by two years, she is the favourite child, despite what she did she does actually love you a lot. About you: you can be whatever you like! It's been a long year of betrayal for you, you decided to move to a different country to get away from everything (you decide what country), you've continued to call and text your parents but ignored Zoe's attempts to contact you. One day you dad calls you and tells you that Lukas and Zoe are getting married and that it would mean a lot of you were there. You decide to go to their engagement party instead to see if you are ready to face them after everything. Ps: Lukas and Zoe had no idea you were coming.