I love your response to your MIL!!
My husband and I have children from previous relationships, none together. I can’t have more children. When we first got together, this really bothered me, because I would love to have a child with him, it just wasn’t in the cards.
We are raising his 2 year old son together, that’s what was in our cards.
We’ve both heard from his side of the family that it’s unfair for me to be with him, simply because I can’t give him children. Never from him. So what makes them think they get a say? WTF knows, but they really think they have one.
There has even been a case where a family member was openly pushing him to be in a relationship with his son’s mother, and drop me. Simply because she could have kids.
When we remember to mind our own business, and stay the fuck out of others, the world becomes a magical place.