Rayrayray,
God help us if there are two sets of IL's like mine. I do sincerely hope your situation is better than mine.
I have IL's from hell. The bottom line is my IL's chose to hate me since day 1. There is nothing I can do to appease them. Had they chosen to accept me, that love is unconditional.
Day 1 started with GASP... I didn't wear pantyhose with a dress to a formal event, I kid you not. It was such a big deal that Coo coo for coco puffs SIL decided in return to not wear pantyhose to my wedding to make a statement, like I cared. None of my bridesmaids did, either.
My MIL also goes through my drawers when she visits (fortunately not often). I posted earlier on a similar thread that she commented my underwear was "not appropriate for someone your age. You should buy pretty, expensive underwear." ie. not slutty enough. However, had I expensive underwear, I would be a slut. Get my drift?
She also drove 6 hours (unannounced) to stay for the weekend at my house.
My engagement ring was "cute, but small." (1 carat). My SIL has a 2 carat, and their family is struggling to pay the bills. But it's all about image of wealth.
I wrote to her in blue pen once. How dare I. She's an elder, it should have been in black (?). All the relatives heard about this one, too.
When I had my son, she said that I couldn't be a good mother (because I worked) and since my husband had to eat (I am the breadwinner of the family), she "decided" that I would (not should) turn my son over to her to raise for a few years (she lives cross country). Oh, and send her money, too. That would have been the same as sending him to daycare.
So she's not happy that didn't work out in her favor.
MIL has no money, so I offered to pay health care, gave her money, vacation packages. She complained that the vacations were not classy enough. She blew the money designated for health insurance/needed medications on vacations. Basically it's stressing out about how bad of a person I am that causes her arthritis, high blood pressure, and cholesterol... So I stopped giving her money. Cold turkey. DH is allowed to cut her a check, but he doesn't.
In terms of dealing with DH, I don't care what his relationship is with his mom as long as he supports me. I'm not that type of person to drive others to hate. He was ready to cut her off a while back, but it was me who made him keep in touch with her. Still, I can tell when he's talked to her, because he'll suddenly be pissy at me. I'll call him on it, and then he'll back off.
I don't have suggestions except to be at peace with yourself with whatever you do. If I were to die today, I have no regrets. Another thing that helps me is a book by Philip Yancey called "What's so amazing about grace?". It's Christian-based, but even if you're not, just skip the first 2 chapters... It's about giving without expecting anything in return... sounds crazy, but it's really an "amazing" book.
I write on these posts not to prove that my IL's are the worst. I hope nobody ever goes through what I have. There are no winners in any of this. It just helps me vent, too. I hope your situation is nothing like mine and never escalates to this level.
Good luck.