Your mum agreed to suck off your bully as a last resort to get him to leave you alone. Her two demands were that he not film it, and that he not cum in her mouth. But, as you could have told her, he does whatever he wants.
Your mom went to talk to your bully's dad about his son but ended becoming their family whore, look how she sucks him off as your bully fucks her pussy.
Your mum agreed to suck off your bully as a last resort to get him to leave you alone. Her two demands were that he not film it, and that he not cum in her mouth. But, as you could have told her, he does whatever he wants.