I dont't know if it's common, but I think a lot of us cannot get along well with mother in law. haha! Our husband is their son, and I guess somehow both daughter and mother in law will want different things? Like for me, I feel that now I have started a new chapter with husband, but mother in law still wants to be involved in everything because it's her son.
I dont't agree with my mother in law too. She always wants everything done her way, and she won't listen to reason. But so far, I'm just keeping quiet and giving in cause she is afterall an elder. But I dont't know how long I can take it before I explode like you? :P