My ex's wife cheated on him (a couple of times according to him) and he was consumed with the fact that the children (then 12 and 15) might not be his. One day I opened up his laptop (he was sitting next to me) to google something. On the left where all his favourites came up, I noticed something that said DNA testing. I discussed this situation with him, stating the consequences of going through with something like this. This is how the conversation (concise version) went...
ME :"But what would you do if you found out the children weren't yours?"
HIM: "I would cut them off, it'd be her fault (ex wife)"
ME:"But you are the only father they have ever known, surely you couldn't do that?"
HIM : "Yes I really think I could"
What would you think?