Sometimes people finance their new relationships with lavish gifts. While a routine relationship will acknowledge that expenditure can’t be rampant, new relationships require upfront expenditure to get the ball rolling. If your significant other suddenly has a lot of new cash, they may have cashed out a retirement account / money market / savings account in order to find a new relationship. If you suspect your significant other, and they suddenly have tons of cash, you might want to do some investigation to get to the bottom of this.