Ah... my monster-in-law. I could write a book.
My favorite story goes back a few years. My ILs are no longer members of a synagogue, so on the High Holy Days they inflict themselves upon us. It was Yom Kippur afternoon. I was trying my damnedest to stick to my fast, which had been going for about 18 hours at that point. The ILs came back to our house between morning and afternoon services. And my MIL
DEMANDED THAT I PREPARE LUNCH!!! 
They purport to be Jewish, but they ignore the inconvenient parts of the faith, like fasting on the holiest day of the year.
There's her incessant whining that any beef or lamb that isn't charred beyond recognition might as well be raw, and that DH and I would DIE if we ate it. (I had to teach DH what a steak is supposed to taste like - medium rare!) There were the times she chewed me out for eating "raw fish" (sushi). She criticizes my wardrobe - too much black - to the point where, if I feel like being passive-aggressive, I'll wear all black when we see them. And the one time I joked that wedding planning was a lot of work and we should just elope, she SCREAMED at me about how she DAMNED WELL
WOULD BE AT HER SON'S WEDDING!!!
And then there's the baby nagging. The ink wasn't even dry on the marriage contract when she started in. DH is an only child, so the only way she can have a grandchild is if we have children. She doesn't give a damn about how many sleepless nights we have, how many diapers we have to change, how pregnancy and childbirth would destroy my body, how much money we have to spend to get the latest and greatest for our baby (and did I mention she wants me to quit my job and be a SAHM rather than letting "her grandchild" be "raised" by day care?). She just wants her grandchild. Um. Yeah. If she wanted a grandchild sooo badly, she should have thought of that before she decided to have only one child and take the risk that he might marry a childfree woman.
I limit my contact with the ILs as much as possible. Unfortunately, I do have to put up with them from time to time, and I do so because I love my husband. There haven't been any major problems lately, mainly because everyone is on their best behavior when we do see each other, and DH has told his mother to lay off the baby nagging. Hopefully, that will continue.
Hybrid Mode
