Here's are some more details: Anne was married to Christina in a ceremony that is legally recognized in Washington State where it took place, but is not recognized in all states. The question arose when Jack, George, Anne, and Christina all went on vacation together at the Four Corners Monument. Here's a picture of Jack, George, and Anne. (Christina was taking the picture.) At the moment in question, Jack was standing in Utah, George was in Colorado, Anne was in New Mexico, and Christina (if that matters) was standing in Arizona. (The photo doesn't capture the exact moment we are asking about.)

Here's a visual aid that might help.

If you think you know the answer, you should submit an amicus brief to the US Supreme Court, which is currently considering the problem.

(Credit to Tripadvisor.com for the photo.)