No pretentious intent. I was taught "professional rank" rules in social address, yet wasn't sure, given the contention around using "Dr." with DNP. Nonetheless, I found a reliable source for my answer, see below. Take care~ Nurse L. According to Emily Post, "When a married woman uses the title "Dr." (either medical or academic) socially, addressing social correspondence to the couple is a little trickier. If her husband is not a doctor, address letters to Dr. Sonia and Mr. Robert Harris. Her name comes first because her professional title "outranks" his social title". From Emily Post