Apparently they lasted two weeks, according to this article. Doesn't say why they divorced, but if it was just two weeks, I'd say you're right.
It's so weird that I posted this thread yesterday because guess who was on Craig Fergueson last night? Tom Selleck! Wow, he can still make my heart go pitter-pat. What a *great* looking man.
There was a young actress that came out after him named Connie Britton. She was blushing and giggling and when she sat down she said, "Tom Selleck just kissed me! He was my first heartthrob!" She could barely talk for the first part of the interview. It was adorable. I guess he has that effect.