I think the "devil" SIL is always the troublemaker between the MIL and DIL. Mostly MIL's are normal with their DIL's but the SIL's will never let them live their lifes in peace!
A MIL will always say that her daughter is correct..and DIL is always wrong!!!!!
Wow, what a generalization!! Then there are DIL who just look for trouble, and due to insecurity try everything in their might n power to seperate hubby from his family altogether thru lying/drama...etc