"I fell inlove with my Ex girlfriend" Jennie X Female Reader

Y/N was coming back from Australia to reunite with her long time Girlfriend Jennie Kim but then when Y/N arrived at there place Y/N saw Jennie making out with another guy A. K. A her cousin Hanbin then after Y/N broke up with Jennie immediately but then one day Jennie ask for another chance but Y/N has a new girlfriend named Kim Jisoo will Y/N still fall in love with her ex A. K. A Jennie Kim or Will she just let her go?