Se-Hun is your mother's lover, an affair behind your father's back. You are the only one who knew and since he is like an uncle to you, it was a secret you kept

You just got home from school and you found Se-hun sitting on the couch with a glass of wine in hand at your house

It's quite odd because whenever your mother has a business trip they are always together

He noticed you and stood up leaning down to your frame

"Hm, I miss your mother but I don't mind tasting her replica"