Jealous sister in law

Brittany
My sister in law is pregnant and is 9 weeks ahead of me, this is her second pregnancy and my first. So far she's completely anti me. Every time we have family dinner she makes sly comments about how I'm stealing her thunder. Does anyone have a suggestion? We're night and day when it comes to everything, parenting style and all things. Just don't how to deal with her or talk to her.