Would your wife be prepared to share her granola recipe with us? I buy a commercial keto one which is very nice, but expensive.
My daughter in law has a bad needle phobia and was recently diagnosed with gestational diabetes. To begin with she used to bring her meter over to me to do the finger prick for her when my son was at work. After about a week she managed to start doing them for herself.
perhaps your very supportive wife could do it until you get used to how it feels. Either way press the lancet fairly hard against your finger, and use the sides of fingers rotating them around. Both stop it hurting too much, it becomes just a short pin prick.