Pillow'd Knees

I've read that there is a remedy for lower back pain. It involves the sufferer sleeping with a pillow held between the knees, if he or she normally sleeps on the side. This resembles me, so I figure perhaps I'll give it a go. It's really hard to roll over with a pillow in place, or to move it and re-position involves waking right up.

The more serious presenting problem is there's no room for my wife in the bed, given all the thrashing around I'm having to do.