It's bad to deceive your coworkers.
Marie is invited to a work party.
Mary wants to bring cookies.
Mary buys cookies and mentions the store she bought them from.
Mary buys cookies but says she made them when they are complimented.
Mary's co workers think she has great taste and the store gains more customers as they go there to shop also.
Mary is found out and her co workers now know her as a liar.