Try not to judge the situation just because she's your MIL. As others have said it could have been innocent. My MIL has a serious case of foot-in-mouth but I know she means well, and if it really hurts me I tell her rather than hold onto it. Its only fair. And the one thing I've learnt with MIL's is that the reason they are often more honest with their DIL's than daughters is because they don't have the baggage of raising you, and in most cases they don't fear you because of this. I know this is the case with my MIL. And I am glad that she can be honest, even if at times she says the wrong thing, but we just talk about it and she is always devastated if she's hurt or upset me.