We all have thought it at some point Davide, when a spouse dies you just have to grieve a loving partner's untimely departure and as hard as it is there is still closure. Life dealt you a $hitty hand. But as a LBS the rejection of a loved one, the resentment and knowing that they willingly are wanting to get rid of us breaking up families is hard to bear. and the grief is not less in anyway. But at the end of the day, we can only think of them as they were and cherish that they are still alive.
Sorry to hear about your friend, here life is dealing some real bad luck to these folks, his wife and daughter especially and in our case our spouse are causing this self inflicted misery to all of us. I hope your friend recovers soon.