A true gentleman doesn't talk about his love life for profit and personal publicity. It's not like we all don't know the sordid details already...what's the point in rehashing old tabloid fodder?
I have a different attitude, and I'm going to defend him again.
The story of his life is inextricably interwoven with hers and I don't see why he shouldn't talk about her. Diana sought him out, Diana initiated the affair, Diana wrote him letters, Diana sent him food parcels in Iraq, Diana spent weekends with him at his mother's home, and Diana loved him and he loved her. It was a long relationship that gave them both happiness at a time when she was very unhappy in her personal life. He made her happy and gave her something to look forward to.
The relationship between Hewitt and Diana was much more than sex. They were friends, and companions, and and he can provide us with an insight into a Diana in a way that no-one else can, and certainly into an important part of her life that no-one else was privy to.
I don't see why he should be required to keep this important part of his life a secret, simply because a gentleman isn't supposed to talk about his love life. Well a lady, especially one who is in line to be Queen, isn't supposed to have affairs, but Diana did, and everyone in Royal circles knew. Diana didn't want Hewitt talking about it because the affair becoming public would have disadvantaged her. It should be noted that at one stage Diana wanted him to talk to one of her pet newspaper people, but he spoke to someone else.
William and Harry certainly knew about the relationship, so Hewitt writing about it now isn't going to come as a shock to them. They are both grown men now, not children of tender years who will be scarred by the revelation that their golden goddess of a mother was less than perfect.
Hewitt was significantly disadvantaged by the relationship. He lost his career, was labelled as a cad, was a social outcast and has been very short of money. I enjoyed reading "Love And War" and see nothing at all wrong with him writing it. He admits he made a huge mistake co-operating with Anna Pasternack on the other book (which I have not read) and wanted to pull out of it but was powerless to do so because the contract was with Pasternack and the publisher not between him and the publisher.
I am always very interested in autobiographies, for they give us the opportunity to get into someone else's mind and find out how they view things and how the feel/felt. Hewitt is a primary source and valuable for that reason alone.
I hope the film is not sleazy. I agree it might not be in the best of taste to make it, but, as long as it is not sleazy and sensational I won't condemn him for making it. In this regard I reserve my rights till I've seen it! Diana's dead and can't be disadvantaged by it and her children are adults. If her reputation is affected by it, too bad. If she hadn't had affairs there would be no risk of them being documented, and if she hadn't claimed the moral high ground she'd have less distance to fall.