Cover picture from PHuRiE on furaffinity.

The story is set in a reiteration of Equestria where everyone is anthropomorphic.

Button had turned 18 and had developed an unprecedented sexual attraction to his mother, since puberty.

Button: 18years old, 5'5, 120lbs, having the ideal physique of a supposed human twink

Mother(Cream Heart): in her 40s, 5'4, 133lbs, slightly chubby yet healthy physique due to diet and regular physical activity, approximately F cups.