They set with their freshly brewed coffee

What are They Talking About

Sitting at home one afternoon, a retired doctor and his wife decided to call another couple to see what they were doing.

"Oh," said the other wife,"we're just drinking coffee and talking."

The doctor's wife hung up the phone. "Why don't we ever do that?" she demanded. "They're just drinking coffee and talking,"

"So," said the doctor,"make us a pot of coffee."

Soon they set with their freshly brewed coffee, staring at each other. "Call them back," he directed, "and find out what they're talking about."

Could you tell me what "set with coffee" means?