Buy two pistols. If your wife is petite, she won’t care for the big blast and kick from a .40 or .45.
LOL! I laugh about the .40. My brother-in-law is teaching me to shoot. He had me try his .40 After the first blast I would unconsciously pull up every time I pulled the trigger. Worse, I would close my eyes. He says he will get a smaller gun for me.