Question Of The Day #5: Fantasizing

So, Scenario: You And Your Significant Other Are Out At The Club. Y'all Dancing, Having A Good Time, Had A Couple/A Few Drinks...Your Significant Other Then Dances With Someone Else; Nothing Too Crazy, Just Having Fun. Later That Night, You Two Go Home And Have Some Good Sex. But It Was Later Revealed That Your Significant Other Was Fantasizing About The Person They Danced With.

So, Here's The Question: Do You Get Jealous? Why Or Why Not?