I do think if he had been cheating or there was an OW, you would have had more 'signs'...the most important one coming from your gut. In all of the posts you have written I can't remember you alluding to that as something that crossed your mind.
And I agree with Accuracy about giving you the statement in the first place if he felt he had something to hide.
TPS Me: 44 H: 42 M14 T17 S10 D7 10/10 H moves out after death of his father-same month 21/04/12 H is 'DONE' 04/05/12 OW/PA confirmed (rumors from 2010) July '14 H ends affair May '15 H moves back home