That means that technically you'll be sleeping with your sister.
You can have as much food as you want.
Real-life sisters Kimberly Williams-Paisley Darrow Mysteries, Father of the Bride and Ashley Williams Never Kiss a Man in a Christmas Sweater, The Jim Gaffigan Show are joining forces! A female reader, , writes 9 June 2009 : If your going to do this stay away from family, sisters etc if something goes wrong then your lose them for some sexual fun its not worth it, find a couple with less connections to you both, then if you dont enjoy it or it turns out bad you can just walk away and move on, if its a sister then your always have that in the back of your mind! We decided to just play into the twin theme that had followed us everywhere.