Mary Cooper: Thank you for picking me up.
Sheldon: Oh, you're welcome.
Mary Cooper: I was speaking to your young lady.
Amy: My pleasure, Mrs. Cooper.
Mary Cooper: Oh, please call me Mary.
Amy: Okay, Mary.
Sheldon: You know, that doesn't work for me, let's stay with Mrs. Cooper.
Mary Cooper: Sheldon, don't be silly.
Sheldon: Wh-, what? That's what I called you 'til I got to know you better.