what would you do if you heard your kid say this

em
On my last day of school, we finished at lunch and everyone went to the beach after school. During mass, I overheard one girl telling her friends about how her mum wanted to make her lunch for her, so she'd have something to eat on the drive to the beach, but she told her friends "I'm not gonna eat that shit, I'm not a gay c***"
What would you do if you heard your kid speak like that?