My DH and I are atheists and are choosing to raise our child with that belief.
My MIL is extremely religious and has always been in denial about her son not sharing her Christian faith. We have always been respectful, but not participated in going to church or prayers before meals, which she takes very personally.
Our son is 5 and recently told us that when she watches him, she makes him pray before eating or going to bed (which I would be not thrilled with but okay with), but when he asks why, she says that he'll go to Hell if he doesn't. She told him that she wants him to be baptized with her soon and said that if he goes with her she'll get him a present. The final straw was when he told us that she has said his best friend, who has two moms, doesn't have a real family and that he shouldn't play at their house anymore because they're "not nice" and "scary", which left him in tears.
We talked to her about it and she wasn't apologetic at all, saying "someone needs to teach him some values". I'm still livid and haven't spoken to her since this weekend, and have ignored her calls since.
Is it an overreaction to not let her be alone with him ever again? I can't stand the thought that she's filling his head with such bullshit and going behind our backs like this.
UPDATE: we invited MIL over for lunch yesterday. We once again reiterated that we don't appreciate her scaring our son and disrespecting us as parents. She remained unapologetic. We told her that once she apologized, we would consider letting her spend time at our house with him, but not alone.
She continued to refuse to apologize, and she said she's only doing the right thing. So, as of right now, she is not to be around our son in any circumstances. I'm disgusted that she's made it come to this.