"She's been great. She's doing everything, I have to be honest," he said on CBS' "Late Show with David Letterman" Monday. "I'm doing nothing for the wedding. I'm just going to show up and say 'yes.' I only chose the music and the food, that's it. That's all I did."
"We have the most valuable player of a championship basketball team getting married to a lovely woman who's a talented actress on a very popular television program," observed Letterman. "Who's calling the shots, really?"
"It depends. It depends," said Parker, laughing.
"She is, is what you're saying," quipped Letterman, a comment that received a grin from Parker.
Longoria, 31, and Parker, 25, announced their engagement on Nov. 30.
Even off the court, Parker has to deal with rules. Longoria explained to Cosmopolitan how their relationship rules keep things on track.
"We never go to bed angry, which sometimes frustrates Tony because he'll be like 'Please. I have a game tomorrow. I need sleep,'" she said. "Another rule we have is that nobody is ever right. I don't need to be right. I just want to be understood. The same goes for him."