Hi FloridaMan,
As with so much to do with infidelity, there is not an answer that fits every person or every scenario.
I really think that the 'only sex' issue is a blind alley and a distraction that takes you and your wife away from the issues that have to be addressed and fixed if reconciliation is to happen.
The biggest of which is a person (1) having the capacity to be married and still initiate and take part in an affair, and (2) why they took that action rather than fixing themselves or talking to their spouse where the revealing insight exists.
As a rule, sex-only relationships have to be short-lived. A one-night stand is the classic example. Two people can have a night of sex without even knowing each other's names, and then go their separate ways. A totally sex-based relationship, played out in 24 hours.
Where an affair has been longer, and involved multiple meetings, people in the affair make up their own narratives, to justify what they are doing in their own mind, and again if they are caught or they confess.
So your wife may have told herself, "This affair is perfectly okay, because it is just sex and I will not leave my husband because of it".
They never ask their spouse's opinion though, do they?
However, no affair is emotion-free, because human beings are emotional creatures. We have feelings about any person that we spend time with, and there is no way people undress and have sex multiple times without developing emotional feelings for them.
It may not be love, it may not be respect. It may be similar to two criminals robbing a bank together; we are both as shitty as one another, but don't we make a great team? But no affair that lasts for more than a few meetings is without an emotional component.
Lust may be one of the seven deadly sins, but it is also an emotion, so a relationship based on lust is a relationship based on emotion. Just because it was not high-minded virtuous 'love', or even the desire to start a new life together, does not mean there was no emotion there at all.
And I think that is what makes it hard for you to believe that your wife's affair meant 'nothing' to her. It meant enough to her for her to lie about it to you for six months, and to ignore the pledge of fidelity she made to you when you married. So her decision to have her affair was also a part of her emotional relationship with you, and how she frames her relationship with you.
It is also artificially compartmentalizing to suggest that an affair happens in complete separation from a marriage. They never, ever do.
For the period of an affair, a cheat maintains parallel relationships with two people: their spouse, and their affair partner. And to do that without having a nervous breakdown, they have to create justifications, excuses, reasons, minimisations, and a way to live with what they are doing. They only people who do not need to do that are sociopaths or psychopaths.
So what many betrayed people are told after an affair is discovered or confessed is what the cheating spouse told themselves for months or even years to help them live with their own actions.
A series of one night stands might be purely sex-focused, but an established affair with one affair partner means the affair partner is more than just a body.
And to say that an affair is 'sex only' separates it from the act of betrayal on which it is based.
A cheat does not go off and have sex with an affair partner without first choosing to betray their spouse. So their betrayed spouse has been considered emotionally, and then mentally shoved to the back of the closet before every 'just sex' encounter occurs. Which means that no affair sex is ever 'just sex'.
An equal component of every affair encounter is the emotional process of betrayal that every cheating spouse goes through. Which means they make their unwitting spouse a part of their affair by knowingly casting them in the role of the betrayed.
The sex part cannot happen without a cheating spouse going through a process of emotional detachment from their betrayed partner to enable the extra-marital sex to occur. So even a one night stand with a random stranger (who might arguably 'mean nothing' in the grand scheme of things) requires the cheating spouse to make emotional decisions about their marriage and the spouse they are betraying.
So infidelity is never 'just' sex, because the betrayed spouse is always involved in the process in their cheating partner's mind, even if they do not know it at the time.
To minimise the significance of an affair partner to nothing more than a life support system for genitalia is a variation of the same minimising process a cheating partner puts their betrayed spouse through.
And maybe that capacity for conveniently minimising both you and her affair partner (depending on which of you she was with), is where your wife has a ton of work to do. She prioritised herself and her pleasure over everyone else involved, with no concern for you or her affair partner's wife and family, and even calculated that she could essentially get away with it if she confessed.
That is where the significant problems with her lie, not in how she is attempting to frame and minimise the affair.
[This message edited by M1965 at 3:04 PM, May 1st (Wednesday)]