V and I decided awhile back that our mattress is too hard. Or firm. Apparently there's a difference. Anyway, we picked up a mattress topper yesterday; it was lumpy and noisy. We're returning it; we don't really feel like figuring out how much we can afford for a new one, and what kind to get.
So we put our futon mattress, which lives in the second bedroom and has no frame, on top of our bed.
And slept like sleepy babies.