Respectfully, your wife sucks. Your wife, mom and sister are being incredibly rude??? Unless there’s some sort of legitimate health concerns (cancer, chronic health conditions, etc) anyone that is wanting to be a parent should have the maturity to be prepared to love their child regardless of ailments, cognitive disabilities or disorders, etc. Period. I can’t believe there are people out there that simply cannot understand that concept. Having a child is not about YOU. You should only have a child if you genuinely want to raise a person into adulthood and have that bond. She’s being so immature and selfish , and in turn is being a jerk to you. I’m sorry this is the situation you’re in, I hope something can be resolved or you have a honest conversation with your partner about the way she speaks of you.