Chelsea had the most exciting news. She burst into the room shouting, "Dad! Mom! I have some great news! Nick asked me to marry him. He is like the biggest hunk in Washington. We are supposed to get married next month."
Bill took Chelsea in the back and said, "Chelsea, your mother, although an ideal administrator and public speaker, has never had much to offer in the sack. So, as you might have heard, I have been known to fool around with other ladies on occassion. Your boyfriend Nick happens to be the product of one of my love making sessions. He is my son and thusly, he is your half-brother."
Chelsea ran out of the office screaming, "Not another brother!"
She rushed to her mother's side, telling her all about dad's shameful behavior and how every man she dates turns out to be one of her father's illegitimate sons.
Hillary began to laugh and said, "Don't pay any attention to him. He isn't really your father anyway."