We don't want to sound mean, but a Capricorn and Virgo match is one of the most boring in the zodiac. Both signs live by routine and structure, and they hate when things don't go according to their well laid plans. Yes, they do love comparing excel spreadsheets and talking about household budgets together, but eventually even they will realize there's no real passion underneath their common goal for order and control.
Though neither Capricorn or Virgo is known for cheating, the dull environment can certainly create a situation where one or both parties feel tempted by a saucier, more spontaneous sign. They can definitely work to avoid this, but the solution is that both will have to change their ways in order to create more excitement. Most of the time, they'll simply give up.