Welcome to the forum godless.
My daughter is (ex) Christian, married to a muslim and has supposedly converted to Islam although imo she doesn't behave like any muslimah I've ever seen or heard of
They too have a child, a boy, that my muslim son-in-law insists will be circumcised in his country (Tunisia) when he is about 2 or 3 years old. He's 17 months old now and even if my daughter can be persuaded and is prepared to allow it to happen then I'm going to do everything in my power not to let that come about. If it's needed as a medical procedure then fair enough, otherwise a big NO as far as I'm concerned.
So do you live with your husband and his family in his country and if so which one? My daughter refuses to live in Tunisia and so he's stuck there trying to get a visa and she's living here in England and goes to stay with him several times a year at the moment. I hope he does manage to get a visa and he comes to live here because I feel she has much more control of the situation here than she ever would have living in an islamic country.
The very mention of circumcision makes me feel sick to my stomach and incredibly sad. Actually I never had a problem with male circumcision until I realised that my older son was very angry that he had been circumcised as a young boy. I get on wonderfully with my sons but the older one let slip a few years ago that he blamed me as much as his dad for letting him be circumcised.
The truth was that I was powerless to resist because he was literally whisked away from me with no warning while we were back visiting my father-in-law on a short holiday. He had arranged it all unbeknown to us and my husband thought it would be a good idea to get it over and done with. I was not happy at the time about where and how it was done and the fact that we had no say in any of it.
Now years later I feel even worse because I know my son wishes it was never done.
Perhaps your daughter could think of the impact it might have on him in adolescence and later life.