Not sure this is going to go over well

So a bit of a story. My husband as 27 when I met him, I was 18. We immediately knew it was meant to be. Well an 18 month deployment later I met his family who are Mormons. I am a quiet, introvert who was raised Pagan... yeah. He is the 2nd of 5 children and literally never tells his family anything because he has such a bad relationship with them well 9 years later they still hate me. So we stay away, I mean his dad literally tried to pay off his youngest daughters fiancee, hoping to make him leave her because he left the church. Well I'm 5 weeks pregnant and my husband has said they will not be told, and eventually we will show up with a kid. we eloped, that made his parents hate me more, now this...i really hate being hated because of my background. Where as my mom loves my husband and she's ecstatic about he baby... do you think this is a smart descision???