I Love Her, But

I've been married for a long time my wife asks me if I want more kids. I tell her "no I think our kids are enough". The truth is I do want more kids, just not with my wife. I love my wife and am happy to spend the rest of my life with her raising our children, I just don't want her getting pregnant again because she and our last child almost died in the hospital and i haven't had the heart to tell her, the story would break her. You'd think ok just get the snip snip done but I refuse to get a vasectomy because I want to be able to naturally reproduce for the rest of my life and I don't like the odds of the vasectomy going wrong and not being reversible even if they are low.

Additionally I don't sleep around or talk to other women but i know THREE different women who have asked me to father children for them, no strings, no money, no relationship they just love my personality and know I have good genetics. Two of them I'm sure would even be open to being a sister wife and even help raise all our children together.

But there's no way to bring this to my wife without her feeling threatened or as if I'm cheating.

Is this me just being a typical man wanting more then one wife? I genuinely feel like there's more then enough love within my heart to truly love 2 wives and mothers to my children.