I would strongly advise against this. Not for his sake but for yours. Having been in a similar situation, I know the hurt of it when he wants to work it out with the wife aftr I gave him my all. That was my first mistake. Giving him my all when it wasnt his to take or mine to give in the first place. He really needs to finish up with that relationship. Be there as a friend, sure. But please dont let him until the divorce papers ink is dried.