... or have an electric blanket.
Wow, this is a perfect example of the absolute worst-case scenario as far as household EMF goes. Unshielded, close to the body, and none of the fields cancel, just reinforce.
Joe, you need to go off on these people about how many people have died from cancer caused by electric blankets and how it's the leading cause of death, second only to food poisoning caused by agricultural insecticides. You know, something outlandish and tinfoily we'd all crack up laughing about, but say it with as straight of a face as possible and see if they call you on it.
If they don't... cha-ching! It's their money, give them whatever they want to pay for.