I'm Doug, and I'm sorry to hear of the confusion. My goal is to provide you with excellent service today.
First of all congratulations on your pending nuptials! That is great.
Being appointed as a legal guardian over a minor child does not qualify that child for a social security child benefit unfortunately. Only children who are the biological children, or the adopted children of a retired person, or a dependent step-child are eligible for the child benefit. And that includes a survivor benefit in the event that the parent dies.
On the other hand, you as the wife would be eligible for a survivor benefit of you are married for at least 9 months before your spouse passes away, and you will also be eligible for a spouse benefit based on your new husband's lifetime earnings as soon as you have been married at least 12 months.
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,