Could Penny be indirectly responsible for the early demise of her son by subjecting her body to those experimental shots years back? I wonder... could the whole thing be better had she just went to the beach for BBQ, nua-ing, smoking and drinking instead of foolishly going for those experimental shots? Penny and family seems to be the kind of naive and follow whatever the authorities say without standing up and question the whole BS.... so well that's the outcome... and she probably doesn't even suspect it or perhaps denying it...