How can I get my bed back? I dont want to share it with my sister!?

a full size bed is enough for two people but i can understand where your comeing from. you could ask your parents to buy a blow up matress for your sister to sleep on or a cot (a fold out bed) for the most part their comfortable, won't pop, and are easy to move out of the way.(b/c it folds up) their not that expensive either