I would have repackaged the delivery and switched out the murder weapons with harmless items or slightly different versions of them. Instead of a 12 inch hacksaw a 6 or 3 inch hacksaw. Hair shears instead of gardening. Color safe chlorine free bleach, lime juice instead of lye. Murderous wives are very particular and the substituted items would really get under their skin. She would have to return the items and wait for a refund or reorder to arrive. Always such a hassle. That would buy you time. Also switch those photos of you with ones of her or a random stranger. Maybe even replaced them all with the play school toy versions.