I bet she won't like the Beretta 92. That is a huge gun. I have a 96, (same thing, but in .40), and it's almost too big for me. Having said that, it's also a very nice gun. I used to have the FS version, and now have the A1 version. I like the FS better.
Think seriously about getting something you both feel comfortable with owning/shooting/CC. I'm a big man, but decided to focus on 9mm and .380 for HD/CC for my wifes and my sake. Better to have 2 people willing and ABLE to protect your lives than just one!