Mrs & Mrs Manoban

Lisa and Jennie Manoban are a normal married couple, living a normal life in a normal suburb, working normal jobs. As they tell each other. If you can call secretly being assassins "normal". But neither Jennie or Lisa knows about their spouse's secret, until they are surprised to find each other as targets! But on their quest to kill each other, they learn a lot more about each other than they ever did in 4/5 years of marriage.

Based off the movie Mr & Mrs Smith, if you haven't watched it I recommend you do.