Flip the Switch
You think you know someone until the day they flip a switch on you. We all have that switch, but for some of us, it’s more prominent than in others. You can know someone for years and think you have a good understanding of who they are until something happens to them or they finally reveal their true character.

One day they think they know and like their mother-in-law. Then a few years down the road, she changes into an unbearable person to be around that one-ups everything and pretends to be someone in front of people. Something must have happened in her life to bring out such character, or maybe she always had this inside her.