My Uncle and SO

Okay so I should start off by saying that my uncle is already fighting with my mother, his daughter got married to someone he doesnt approve of, both of his sons can't work for medical reasons, and I'm like his second daughter. Me and my SO are TTC and we didn't want anyone to know but he somehow found out and since then he has been physically and mentally abusing my SO (they work together). He constantly tells my SO were not ready and smacks him at work and told him he will hurt him if I get "knocked up". Now I'm afraid that if we do conceive he will make my SO's worklife a living hell. Please help I need some serious advice.