Over the other side?

Everyone is an actor over the phone... For my mum's case, she loves people calling her and complains about stuffs but one thing she dreads is one that goes on and on. If that happens she'll just come up excuses, sometimes a very ridiculous one. I overheard her on the phone telling her friend exactly what I am writing now. She said "well, you know it’s not good to use back the same excuse again." That's a side of my mom that I don’t know...