She couldn’t possibly squeeze in anything else; her life with Mr. Snyder is a constant adventure.

Hiring these two, as Warner Brothers has recently done for its revival of the “Superman” film franchise, is strictly a package deal. If a film company doesn’t want her to be one of the producers, “it’s a deal breaker,” said Mr. Snyder, now 44. “Our relationship is husband and wife, director and producer. My wife is my best friend. I trust Debbie’s taste and way of navigating the world.” (For “Superman,” they, and others, have chosen Henry Cavill, he of the cleft chin, strong jaw and perfectly bulked body, to star.)

Ms. Snyder, 41, said: “Directors go away to create for eight months, and if your spouse isn’t involved, it puts a lot of pressure on the marriage, because the director is having these intimate life experiences that you can’t relate to. During the process of making a movie you have to bond with those people. It has to bring people really close to each other. You have to unite to get it done, and there’s a lot of time between takes, and you sit down and you talk about your life.”

Is she afraid of on-set romances? “Listen, if there’s going to be an infidelity, there’s something wrong with the relationship,” she said. “But if you’re apart for several months, that definitely puts strain on the relationship.”

Mr. Snyder’s cinematic style is graphically bold, computer-aided, fantasy-oriented and sometimes violent. Spears in the eyeballs. Buckets of blood. Shattering glass. Early on in their courtship, while he was editing “Dawn of the Dead,” he remembered how she would tell him how awful she thought some of his edits were. “It made our relationship stronger,” he said. “A director has only one thing, a point of view, so when you get a partner, a producing partner. ... ”

Mr. Snyder then paused and looked at his wife, who jumped into the conversation.

“It’s my job to get his point of view out, to help him develop the script, to be the liaison between the director and studio,” she said. “My job is to shelter Zack as much as possible.”