Why did my old music teacher complain about her boyfriend to her students?

When I was in elementary I moved to a new school. Our music teacher was a younger sweet woman but she seemed to have a boyfriend who was in a rock/country band. She would tell us that he was lazy. How he’s a bad father to her kid. Among other stuff. Do kids need to hear about this?

She even sang a song called “a bum bum bum a bum bum bum Andrew Kenny is a bum bum bum” like arumsumsum….

Why did my old music teacher complain about her boyfriend to her students?
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