Lubricant

It seems like I always have an "observation" about someone at work, for the most part Mrs. Potatohead. So, today she's talking tome about her kid, which she just started on day care. So, she's talking to me right and saying that finding a good sitter is tough and that good babysitters make a lot of money and how they don't have to market themselves if they are good because everyone knows about them and they get a lot of work. Then she proceeds to tell me that "if you are a good babysitter you make good money, because baby sitting is a very lubricant business". I kid you not she said that to me. I held it in, I really did an awesome job of not laughing in her face, but I did immediately turn around and went right into the nemesis' cube for a good laugh. You know she's probably said that to other people to and nobody corrects her. Hey who wouldn't be confused, lubricant, lucrative, there the same word right?