My in-laws...

My in-laws are a completely different religion than my family is. This has been a struggle since my husband and I got married in my church 7 years ago. We've been going to a church pretty regularly, since I found out I was pregnant, and my husband is completely fine that it's not the same religion as his family's. Now we're expecting our first child next month, and I think I'm going to have the fight of my life, trying to keep them from interfering with the religion we're going to raise our child in. My sister in law (my husband's, brother's, wife) just had her baby shower today, and my husbands grandma gave her religious material from their religion. My baby shower is this Saturday, and I'm sure she's going to give me the same thing. They know that I'm not ever going to convert, but I don't think they realize that I'll be raising MY baby in my church. I don't know what to do, because I'm scared to even let them babysit her, for fear of that they'll try to teach her their beliefs behind my back. My husband isn't really much help, because he doesn't see the harm in letting them do that to our baby. What should I do? I don't want to have to threaten them, saying that I won't let them see her if they ever do that, because then my husband would be mad too.