Truth and Consequences (Charmed)

So mote it be.

Cole is working late, and her sisters are having a girls' night in, so on the spur of the moment, Phoebe accepts what seems like an innocent date with a friendly stranger. But good intentions are quickly misconstrued when Cole leaves work early to surprise Phoebe -- and is stunned to find her sharing a meal with another man.

Cole can't believe that Phoebe would betray him, and Phoebe can't believe Cole would even think she'd betray him. Their escalating argument quickly highlights some fundamental trust issues they each harbor. But soon they discover themselves trapped in the underworld, at the center of a lovelorn demon's plot to destroy the Power of Three. If Cole and Phoebe can't reconcile their suspicions and insecurities, there's more than their own relationship at risk!