Split King Motorized Adjustable Bed

Another alternative for her is just get split flat mattresses, and put hers on a piece of plywood and raise the entire thing to the height you need. I actually have the same problem as she does, which is why I got the adjustable bed, but I think I'd be more comfortable keeping the mattress flat and just tilting the entire bed. The only problem being you said she needs it higher than most which means if you go to hide she may slide right off the end and onto the floor. But many people who have this same issue solve the problem by simply raising the head of the bed.