Mother In Laws.......Do They Make Or Break.....?

 Every one who is married has a mother in law and everyone who is dating now,has a potential mother in law.
Some Mothers in law are heaven sent and are so nice they sometimes take the place of a mother in our lives.........Some are not angels and the day you dare to 'step on her toes is the day she begins to plot the end of your union with her child.
Whats your Mother In law (MIL)experience?do you agree that some mothers in law need to start minding their businesses when their children get married?
Some mothers in law even give their daughters in law tough time because they are jealous---your experience and how you tackled the mother in law wahala might help someone else reading this.