When my husband Clark booked our holiday flights, I thought it was one less thing to worry about. But at the airport, I found out he’d upgraded only himself and his mom to first class—leaving me in economy with our two kids. His excuse? “Mom needs the extra comfort on long flights.” As they sipped champagne and strolled off with smug smiles, I struggled to keep our toddlers calm in the noisy back row.

But instead of complaining, I stayed quiet—and started plotting. I wasn’t going to yell. I was going to teach Clark a lesson he wouldn’t forget. While they were distracted at security, I quietly slipped Clark’s wallet into my carry-on. He didn’t notice a thing. And once we were airborne, I waited for the perfect moment…