Yes. You needed a different living space when you set up house together, and you need a new mattress that allows both of you space to sleep without cramping each other. As a rule, a king or a queen-size mattress provides the best room and the best comfort.

You might want to consider a mattress that minimizes sleep disturbances when either of you move in the night. This depends on how much you or your partner move and how sensitive you are to motion. The mattresses in the Simmons Beautyrest product line feature a varying Motion Separation Index, which refers to how well the mattress keeps partner movement from disturbing sleep.

You should both evaluate every potential mattress purchase. A spacious mattress will help you sleep better - and you'll both be more cheerful in the morning.