Seriously though, here’s my opinion:
You’ve been to 3 events already this year, so it doesn’t sound to me like this is anything special. Your wife is an optometrist at a small office, again nothing special. If this was a big, one time gathering and your wife was a big time executive, I would say you should go, but to me that doesn’t sound like the case here. Also I lived in Dallas for a few years, so I know exactly what it’s like to check the calendar the day it comes out for the one game a year the C's come to town and how big of a deal that is. Plus you already bought tickets. All that tells me you should go.
BUT I would be there for my wife. Especially in the 1st year of marriage. I want her to know I’ll always be there for her, and she comes first. I think that brings us to 2 situations:
1. Say you’ll go to the party. Your wife is touched, and all she wants is for you to want to be there for her, so now that you offered to go to the party, she insists you go to the game. She's happy you offered, you get to go to the game. Win Win.
2. But since this isn’t a movie or tv show where everything works out perfect and she may not fall for the first option, offer this alternative. You go to the party, and instead plan a nice weekend get away to Dallas in March. Three hour drive or like 45 minute flight, spend the weekend, go to the C’s/Mavs game in Dallas on Saturday 3/20. Assuming you guys are doing ok financially, make it a good excuse to splurge on a nice little get away. Nice hotel room, nice restaurants, nice tickets. I’ll go to this party, but you go with me to Dallas in March, and we’ll buy the best seats we can, and have a great time in Dallas for the weekend.
I think option 2 might work out well (if that’s something you can do). Besides always nice to have your wife owing you one.
Edit - ah I see Nick pretty much already offered up my #2 option. Beat me to the punch.
Edit #2 - and I also see your wife already offered to take you to Dallas (when I first read it I thought OKC vs Dallas). Go for that. I've been in the last row for games, still had a great time. Also it's likely to be a much better game. Also never had a problem getting reasonable lower bowl seats in Dallas for big games.