My wife wants to spend $5K to attend a cousin’s wedding. I say no. Am I selfish?

Dear Quentin,

My wife and I are fighting over money — actually, a wedding, to be exact. She wants us and our daughter to fly across the country to attend her cousin’s destination wedding. I can take time off work, but I do not want to spend $5,000 on this trip. 

I make a very good living compared to her, and just…