Fuck each other one last time before getting married

Sister Aika is my sister's close friend, she often comes to our house to hang out and we have become closer. One day, when my sister was away, Aika suddenly asked me to have sex, and our secret relationship began from then on. Even though later on, when Aika had a boyfriend and I had a girlfriend, we still maintained this secret relationship. I always had feelings for her but it seems she doesn't feel the same way. Tomorrow is the day of her wedding, it seems like our relationship has come to an end.

She suggested that we have sex one last time, but I still hope things won't turn out that way. When I saw her and her boyfriend kissing in front of the house, I understood that she and I will never have a future together. I sincerely wish happiness for her and her future husband...