It seems to me that you are a bit stressed about those emails. I think it’s better to step back from house hunting and purchasing, get the baby born and raise him/her for a few months, discuss and settle things with your family and husband. Make sure what you both want in terms of a house and what compromises you can make – let the other family know and also know exactly what you can expect from your family (and his) regarding this aspect so you can be prepared to deal with it if needed – it seems to be affecting you too much now. You live in the house not them, you pay the mortgage, not them – unless you plan to have live-in grandparents for the baby.
You don’t sound ready to buy THIS house. If you do you will already have regrets about settling for something that doesn’t make you really happy and your family criticizes.. I wouldn’t buy a house under these circumstances but that’s me. You have to be more prepared mentally and know exactly what you both want.