I am currently dogsitting for a friend - a couple of big, friendly pooches that are great with my children and get along well with my dog and cats.
Last evening my daughter brought a friend over and the dogs, hearing the noise at the front door, bounded over to greet the newcomer.
"Are these your mum's dogs?" my daughter's friend asked.
"No," my daughter replied, "they're my mum's friend's."
"What?!" the other teen exclaimed. "Your mum's friends are dogs?"
I guess you can't hear an apostrophe.