Whats the catch?

The devil visited a lawyers office and made him an offer.

"I can arrange some things for you," the devil said "I'll increase your income five-fold, your partners will love you; your clients will respect you; you'll have four months vacation every year and will live to be a hundred. All I require in return is that your wife's soul, your children's souls, and their children's souls rot in Hell for eternity."

The lawyer thought for a moment. "Whats the catch?" he asked.