Just had to post this, made me laugh out loud!
(http://i.imgur.com/XjWo1.jpg)
My wife does not have a sister :(
Replace 'sister' by 'best friend' ;D
Well...rather my best female friend. ;D
But what if said wife replies "so does your hand and XXX" ??? :P
Then you have automatically won, as you are in a position to throw her off instantly :D :D :D :D :D
You dare!!!! :D :D :D :D
Trouble is if you do get thrown - your in danger of loosing your tackle before you can explain the joke :(
You've never seen her sister. Ugh! :o
;D ;D ;D ;D ;D
If your wife doesn't have a sister you could say mother instead ;)