Can the passenger side airbag sensor be modified to leave the airbag ON all the time?

To be comfortable on longer trips, my wife needs to sit on a pillow, which promptly deactivates her airbag. Tried to get this sorted out with the dealer and with Hyundai Customer Care directly, but no luck: The only response I get is to buy a 'top of the line' model with a fully adjustable passenger seat (but without any assurance that we won't have the same issue. There has GOT to be a way to have that airbag activated all the time. HELP!!
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Answers
Either she has to give up the cushion, or make sure she's buckled in tightly and do without an airbag.
I don't think another type of seat would solve the issue either. I suppose you could run a test with a higher trim line vehicle but generally the sensors in the seat are not designed to detect additional cushioning.