You tell "your girlfriend" that you're sorry to cancel but you forgot about one of your assignments due on Monday. You have too much homework and you'll never get it done with her here, so she needs to leave. You promise you'll make it up to her later.
Both your mom and your girlfriend look at you with a little bit of shock. "Oh... Ok...." your Mom (as your girlfriend) says. She starts walking towards the door and your Amy (as your mom) follows her and whispers something in her ear. Most likely where your girlfriend lives.
You wave to your 'girlfriend' as she walks away. You shut the door and turn to your 'mom' and say, "Come on, you know I'd never kick you out because of homework." She looks confused and stares at you.
"What are... you talking about...?" she asks nervously.
"Oh, come on. I can tell that's you, Amy. You act nothing like my mom - and she certainly doesn't act at all like you," you reply with a smug expression.
"How did you know?" asks Amy.
You try to think of the best way to tell her...