4 Privet Drive; Rooms

[cattatra]

No: HPFGUIDX 130051

In Prisoner of Azkaban where did Aunt Marge sleep? Because there is 
no mention of

A) Her sleeping in Harry's room instead
B) Her sleeping on the sofa, etc.
C) Anyone being kicked out of their room for her

So where did she sleep? Do the Dursleys have a guest room, making it 
a four bedroomed house? If so why not put Harry in there, instead of 
Dudley's second bedroom?

Help me out here peeps!

Cattatra