My husband cooked dinner, and right after my son and I ate, we collapsed. Pretending to be unconscious, I heard him on the phone saying, “It’s done… they’ll both be gone soon.”

My husband had prepared dinner that evening, nothing out of the ordinary—or so it seemed. Shortly after my son and I finished eating, an overwhelming heaviness overtook us. Our limbs felt weak, our thoughts slow, and before we could make sense of what was happening, we found ourselves on the floor, unable to move properly. […]