My mom, truly with only good intentions, sometimes forgets that not everyone thinks exactly the way she does. So, let's say we have a family get together. My brother and I kid around a lot. We always have. I'm almost 50 and he's a little older, so we are pretty comfortable with how we communicate with each other. But, Mom will hear us kidding around and will stew on one little comment and will twist it up in her head until she is convinced that one of us has gravely and irreparably insulted the other. Sohe'll go to the "perpetrator" and say something like, "You know, you really hurt your brother terribly with that comment you made etc." And will go on about how damaging it was...I used to take it seriously. I'd call my DB and apologize and he'd laugh and wonder what the heck I was talking about. And it would happen to him and other members of the family. We finally realized that as she's gotten older she's just gotten these idea and thinks she's being helpful. We have called her on it a few times and she is better about it. Now I know to ask, "Did DB actually tell you he was hurt by X comment?" And if her answer is "No, but I could tell" then I just tell her that if he is bothered by something he will let me know himself.
Also, it's better now, but for years my DH didn't understand that sometimes I just want to vent. If I've had a bad day at work or rotten traffic or whatever, he would insist on giving me advice on how to "fix" it. He's finally learned that I'm not looking for him to fix anything; I'm just sharing my day and trying to let off a little steam. It took time and a lot of me turning the tables on him before he got the point. But he did eventually get the point. It's not help if help is not wanted!