I'm Doug, and I'm sorry to hear of the confusion. My goal is to provide you with excellent service today.
Your wife can determine her social security retirement benefit by looking at her Social Security Statement. If she does not have one, then she can get one online in about 15 minutes. Let me explain.
She can open your own social security online account and see your earnings statement, estimated retirement benefit and much more, in about 15 minutes through this site: http://www.ssa.gov/myaccount/
Because both your wife and your son are receiving benefits based on your earnings history, they are getting less than they would if only one of them were claiming on it. In fact, each of them is probably getting no more than 35% of your full retirement benefit. If your wife switches to her own benefit your son would automatically be eligible for the full 50% of your benefit and it is quite likely that your wife's benefit now will be worth much more than the amount she is getting based on your earnings.
So yes, if your wife switches to her own benefit now, your son's benefit will increase by about 30% immediately.
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
Kindly, remember to rate my service to you. That is how I am credited for assisting you.
I wish you and yours the best this holiday season,