Lawyer And The Devil

So a young lawyer is sitting in his office when the devil appears in front of him.

"I've got an offer for you" the devil explains

"Go on...." Says the young lawyer

"Well from here out your practice will grow 10 fold, your partners will all respect you, your clients will all love you, you'll have a golden tongue with any jury, you'll get all the vacation days you could ever want, and you'll live to be 100" replies the devil..."all I ask is that you wife's soul, your children's souls, and your children's children's souls rot in hell for eternity"

The lawyer leans back in his chair and inquisitively asks, "what's the catch?"