Not choosing anyone over his son… but what about his wife and daughter?? You are pregnant and taking care of an infant. You need to take care of your own health and he should want that too. If everyone makes sacrifices and compromises what would that look like? I think it would be his son sleeping on the couch but maybe being able to store some things in the babies room. Your daughter having her room available for bedtime and nap time and anytime you or she needs privacy. Your husband doesn’t like it?! Well he needs to make sacrifices too. Maybe he should sleep and work in the living room. Then you can have your bedroom for yourself and baby and his son can have the second bedroom. Obviously that’s not ideal but give him that option and see how quickly he changes his mind and takes finding a bigger place more seriously.