If he's single, you might consider inviting him over to your place for dinner. Then, after he's arrived, you could discover you're almost out of beer, and go out to buy some more at a liquor store — thereby leaving him and your wife alone together. Then, after you get back, notice how they seem to be progressing — i.e., whether they're joking and laughing together.
Even if your wife does not suck his (presumably) big black cock that first evening, it would be a good first step toward her doing that during a later dinner invitation, or Saturday lunch invitation. As an excuse for inviting him again, you could mention your wife said she likes him and would like to have him back. Perhaps during his second dinner (or Saturday lunch) invitation, your wife.... with suitable encouragement from you, in advance... will suck his cock, then fuck him in her marital boudoir, while requiring you to sleep on the couch, or in an adjacent guest room (so you could hear everything clearly while beating your weenie).
I mean, hey — if he's someone you work with, there's no need to view him as a "bully." Just consider it natural to invite him over, and do so. He'll probably be pleasantly surprised. My guess is, he would probably accept.