Marcus Trescothick has admitted he was in two minds about accepting the England captaincy for the first Test against Pakistan in Multan on Saturday.
Trescothick was given the job after injury ruled out Michael Vaughan.
Trescothick said: "I talked to my wife about it, asking if she thought it was the right thing to do.
"But I'm unofficial second in command and I believe it was the right thing to step up. It is exciting to think I could be in charge for a few weeks."
Trescothick led England to victory at Lord's against New Zealand in 2004, the last time Vaughan's knee prevented him from playing.
But he insists he has no interest in taking over as skipper on a more permanent basis.
"I know there is a chance I maybe won't be a one-match wonder this time - it could be the whole series," he said.
"But being very close to Michael, I've seen the things it (captaincy) does to you.
"I've seen him go through tough times, and that's probably put me off a little bit.
"It's a 24-hour-a-day job. Even when he's back home I know he spends a lot of time on the phone.
"There are a lot of other problems outside when the games are on that you have to deal with. Whoever takes over, it is a tough job to do."
Chairman of selectors David Graveney believes Trescothick will not have to look far for support and advice, if he needs it.
"I'm sure he'll lean on the senior players like Freddie (Flintoff), Ashley (Giles) and Straussy. "It will not be easy - but he's done it before and he is the right guy," Graveney told BBC Five Live.