Arch Rivals

So my sister was ranting about how soda gives you cancer...while she prepared to buy a Pepsi. We were eating dinner and she eyed my Coke. "I bet Coke will give you cancer." I calmly replied, "So did you hear that Coke bought out Pepsi?" "Really?" she began to scan her Pepsi can. For a minute I thought she was just being funny... then, "I don't see anything here that says that..." She looked up, "Coke didn't buy out Pepsi!" At that point she collapsed into helpless giggles (a fit known to take her when she's tired). I was being sarcastic, but was pretty amazed that she took me seriously. I love my sister...the only one who can bug me constantly and act just as crazy without bothering me much. Her bright and self-confessed blonde outlook on life is refreshing and keeps me out of the dumps.