I know I am guilty of talking to my mother about my mother in law. Have done this for 32 years. Mostly it was just because I didn't understand them. My MIL and FIL were so different from my mother and how I was raised. They were more the hands off type and I was looking to be part of a new family. Maturity on my part really helped. They were different; not bad. I just didn't understand or appreciate their ways. On the up side of hands off, I must say they never interfered in my marriage at all. They cared from afar, and I wanted a more hands on interactive extended family from them.
I have talked to people about my DIL, b/c I didn't understand, the way I saw her doing things wasn't always how they were meant...but I didn't understand, and I really believed she hated me...and she thought I hated her, and boy oh boy did things escalate, we both acted out of feelings of insecurity, negativity and I've said some awful things about her....now I'm very ashamed and humbled by the way I perceived things...awful...it is amazing what the mind sees when we're hurt, angry, insecure, confused and rejected...
I know, most humans don't mean to be mean, or gossip....but we're trying to get someone else's input into the situation...unfortunately, people who know us, are going to side with us...I was fortunate...b/c my girlfriends are older, so, when you get older, not everyone mind you, but for me, I've become so much more outspoken and unafraid to share my true feelings....and so are my girlfriends, so they gave me constructive critisum....which I felt was good for me....however, some people don't like to know the truth, they just want to complain, like the Original posters people....some are gossips by heart...love to stir up trouble...and most of the time, they're perspectives are way off, b/c they are not truly vocalizing, what is really happening....
but yes, I do know what you mean....a lot of times we talk about others b/c we're worried about them, or we don't understand what is going on in they're heads...and we fear discussing it with them, for fear they will take our wanton to discuss it as an insult, so we are left to assume, which is really bad.
Communication is the key to any relationship....you've got to be able to communicate thoughts and ideas and how one sees things perceives things....otherwise, left unchecked, it certainly could escalate into years of pain...
Renny, I don't know what to think about your DIL and her parents? There are so many reasons why people do things, not just wone, however, calling her on it, might cause a whole lot more trouble...then you want....and I originally felt that you should, however....perhaps what you should do is stay as far away as you can...and try very hard