You're welcome, GBS.
I want to add to what I said above, on how women process our (male) struggles "too personally"- that may sound like a fault, but it is not. This is how men versus women are built or created, and there's no fault there. The male has his struggles based on his male physiology/psychology, and does with this rightly or wrongly; and the female responds to this according to her physiological and psychological make up, and does with this rightly or wrongly- no fault.
A man can be caught up in his struggles, and it may not be about his significant other at all, it may not (and often is not) be even about the sex at all. It's often just about him trying to assuage the emptiness, pain and trauma in his life, and the existential meaninglessness he may be feeling, and trying to escape or insulate himself from through surges of dopamine.
But the woman taking this as a betrayal and rejection of herself is understandable and natural. It is, after all, other women that are being objectified and used by her partner, albeit via pixelated images. And here is the divine design revealed, because this ought to illicit a love from the male, enabling him to step outside of himself, and love someone other than himself.
I have often thought concerning my own struggles, even in understanding underlying issues and mitigating factors, that P and MO are extremely selfish actions. Not saying this to bring shame, but to say how unnatural it all is, given that we as men are designed to love women- our woman- selflessly. And, that is part of the healing process, toward ourselves- and toward our marriages.