Definitely NOT! I'd go so far as to say that even if she's someone I really don't care for, I'd do my absolute best to NEVER let her know that. I'd suck it up and play the game.
A good friend of mine is going through something similar (she also has a crummy relationship with her MIL) and now her DS23 and his girlfriend are expecting a baby. They've been together a while. She likes the girlfriend but is concerned that their relationship won't withstand the pressure of a child, it's a rocky relationship and she is ultra controlling of my friend's son. Anyway... she ran into a situation where she needed to stay with the two of them for a couple of weeks. She went out of her way to help out the girlfriend but not overstep her boundries. The girlfriend even commented on how awesome and unimposing she was.
We've learned our lesson well from our over controlling, inconisderate mothers in law and we do not want to do that to our future daughters. UGH. NEVER!
I think there is a different set of rules when it's the mother and her daughter vs. the mother and daughter in law. You have a lot more freedom to speak your mind and tell your opinions to your own daughter....not so much with the daughter in law.
This is a constant topic of conversation between us.