A friend of mine is married with four children. Doug (not his real name) has a very good job and makes at least six figures. His wife Karen (again, a fictitious name) stays home to take care of the kids.
Doug seems happy and is not a complainer, but one day he told me Karen had launched a campaign for buying a very expensive bracelet. Her main reasoning was, “I work hard, I deserve it.” Doug was resisting and as you might imagine, the result was friction.