Am I wrong for being upset?

So my fiance cheated on me with a coworker a year or 2 ago well today he went to another town for work ( Walmart inventory he's a apparel manager) he was only gone for the day and I knew that other coworkers were going and that they would probably all use the same car or something but I was unaware that they would drive 2 or 3 cars back and that he'd be alone in his car with a female coworker for the drive back to town because there is only those two in that car and I'm sitting here nashin my teeth about it am I wrong to feel threatened about it
Am I wrong for being upset?
Am I wrong for being upset?
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