whos ever house it is has to do everything first
brittany is to difficult to get up and go to her sisters room which is against the house rule.
These are usually the rules followed in ones house that a particular game is being played in. These rules will always change from house to house and are sure to always cause a 10 minute argument/debate over them. These rules are known to be made up during the actual game.
For example: if you are playing pool in one person's house, his "house rules" might be that whoever makes the 8 On The Break wins automatically whereas the house rules of another person's house might be whoever makes the 8 On The Break loses automatically.