Anyone who would mutilate the genitals of a 10 month old baby is a bastard, and you will allow it to happen just to keep the love of such a person?
1: Demand proof IN THE QURAN that circumcision is necessary - we all know that not all hadith cannot be trusted.
As far as I'm aware, its only Sunnah and not obligated even in the ahadith.
2: Demand that she also shows proof that he must have it now, and not when he is about to enter puberty and old enough to decide for himself.
3: If my wife told me to mutilate the genitals of one of my babies (I have 4) I would tell her to fuck off, and I'd take my children with me.
You are the only person that baby has to protect it. Don't be a spineless bastard and let him down!
I don't know how you can look him in the eyes.
It's not going to stop here, and childhood indoctrination stays with most people for life. Put your foot down, before it's too late.