Mother in-law is trying to force me to accept my brother in-law.?

My husband's brother is a convicted child molester that was released this past year. As it turns out my husband and I are now expecting our first child and we are having a great deal of difficulty with his mother. She doesn't see what he did as a big deal and he doesn't think he will ever do it agian. My husband doesn't want him around our child at all, however I am open to him being in the same room as him for family events as long as me or my husband are watching him. However, I do not want him at the hospital when my son is born. My family knows what he did and I don't think it is fair we should all have to be EXTREMELY uncomfortable on the biggest day of mine and my husbands life so that his mom and his brother have spared feelings. Also my husband does not want him at her house without one of his until his brother moves out. But anytime anything is said, she accuses me of not wanting her family to be in my life and of hating her son and trying to keep my husband seperated from his family. I am at my end with her and it seems like no matter what I am always to blame. What do I do? I don't want to keep my son away from his grandma, I just don;t want him hanging around his uncle.