I think people are taking the five seconds as too much of a certainty in this.
It's possible it was actually five seconds, but I'd put good money on it being a lot shorter than that.
Pain does weird things to our ability to perceive time (which most people aren't good at at the best of times). Time can feel like it slows down. When I have fallen over, for example, it's felt like several seconds whilst going down, when there likelihood is it would have been less than one.
I was involved in a car accident years ago, that I could swear blind went on for at least 30 seconds, probably more, because so much went through my mind, but that was because of the situation I was in. The reality was the car accident was likely 5-10 seconds max. Without a stopwatch, it would have been a complete guess.
The 'five seconds' may have been closer to one or two. At which point, given you've got reaction time and imminent orgasm, it's a slightly different situation, and he may have stopped as soon as he could (or knew he was in the process of coming anyway, and therefore stopping would be imminent.)
If it was five seconds, then that's actually quite a long time, and whilst personally I probably wouldn't leave my husband for it, as a one off, I could understand how some people might.
If it was one or two seconds, that simply felt like five seconds, then I'd much more take Village's view.