What is your wife like?
My first question is how tall is your wife?
My second question would be what is her physique like?
Why, well my wife is petite and a senior citz., so she does not have a lot of hand strength, which is getting worse due to arthritis.
What does she shoot, my SIG 225. Why, the gun is just heavy enough to control the recoil and keep it within her tolerance. Also, the gun is light enough for her to hold comfortably. A BROWNING Hi Power or BERETTA 92 would be too heavy and the grips just too large.
She found the grip on my BROWNING 1910 too small, so do not overdue it.
Before she settled on the SIG 225, I let her handle almost 2 dozen guns and the ones she like the most were the SIG 225, BERETTA 84 and S&W model 12.
We fired all three.
The S&W 12 has HOGUE grips and is very light with a well polished trigger, a combination she really liked. She did not like being limited to 6 shots and a slow reload.
The BERETTA felt alright till she fired it. She much preferred the SIG, so that is what she uses.
The most important thing is to let her decide. It will increase her knowledge and confidence in the gun.
A trip to a range with some popular rental guns would help as well.
Also, starting her off on a .22lr would go a long way to building her shooting ability and overcoming the initial fear.
Jim