Don't let it get to you too much. There are many people out there with less good intentions and who will always have something to say about anybody else.
Know that you are someone who has the heart in the right place, and try to let it go, although I fully understand how difficult that sometimes is. (having equal issues with MIL who is constantly trying to convince the family that I'm not good for H, nobody follows her because they know she is a bad person)
Good-hearted people will see right through this you know.
