This is episode 53 of 60 of My Daughter's Classmate Calls Me "Mom". Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The closing stretch of the season, where the arc pays off.
Single mom Sophie is humiliated by her daughter at graduation. The top graduate shocks everyone by confessing his love to Sophie, not her daughter. Bella is consumed by jealousy, convinced he's only doing it out of revenge.