I'm not saying not to see a lawyer, you absolutely should. But if you guys can be civil you can each talk to your own and deal with each other rather than adding to the cost and moving it along faster (unless that is what you want). His business is very likely an asset and should be included. Just get him to complete it. You don't need to say anything to him about the contents. When he comes back, if he does, take what he gives you to your lawyer and tell your lawyer about the business and anything else that should be there. Then, after your lawyer blesses it, take it back to him and say your lawyer made these changes.