Maybe he has sex with OW as the excitement of that counter acts the erectile disfunction and he is frightened if he goes back to being faithful to his W the problem will re-occur.
That would be my best guess - that and he has proven himself dishonest more than honest so far. I have seen no effort by him to try and show Patti in any meaningful way that he is being above board; all he does is get defensive- that just stinks to me.
Saffie me 46 H 46 M in 1986 D20,D18,S16,D13 H's A 01/05 to 07/06 H recommitted to M 07/06 renewed vows 09/06 Going from strength to strength