You wanted to have a kid but you were tired of waiting for your "true love" so you just give up and adopted a kid.

One day, you took him to his high school in your car because it was raining, but when you arrived, you asked for a kiss. Like every stubborn 15 years old teen, he said no because "he wanted to look cool"

"Mom / Dad, I told you I don't want to kiss you... I'm in front of my friends... Just leave me alone"