They get divorced, because the man is having his "chase young girls to prove they are still young" period. and they have no time for torrents..

At 45 they realize that all they did is spend money, waste time and lost their family along the way.. fook up their kids in the proces, and they cant keep up with the young girls anyway... so they start downloading porn torrents.. to fight their depression, and look at what they cant do anymore...

Ps/ thats when Viagra comes in the picture.. to keep up with the older woman they have to settle for, who divorced their husband... So in fact.. all they really did accomplice in the end, is change wives...