Well, lets look at a circumstance where it might make a difference if the victim acknowledges their own fault:
Suppose for the moment that the perpatrator was not predisposed to adultery (common jargon, they were not someone with the morals of an alley cat). In general (and yes, I know there are exceptions), women do not seek a lover for sex; they seek someone for understanding. The old saw still holds true for the greater part of humanity: men give “love” to get sex, and women give sex to get “love”.
Suppose further, that this marriage was in a rocky period and had been for some time, that she was having some serious problems with his absence due to his job, that communication had been about practical matters (the checkbook, groceries, who was coming over for dinner) and that personal issues between them were ignored at best, that fighting had gone from issue orientation to ad hominem attacks ("you always…! you never…!), and, if you were to look at Paul’s writing about men’s calling in marriage (giving of himself as Christ gave of Himself - often called that dirty word “sacrifice”), you could not identify the husband as ever having read, let alone understood Paul’s exhortations.
And now, let’s suppose, just for the sake of arguement, that the husband is pretty much headed for the divorce lawyer, but he is hesitating; he’s in counseling, he has asked his priest for advice, he has even gone on a Catholic forum to ask advice, and he hasn’t yet filed.
Kind of sounds like he may still have some possiblity of reconcilliation, don’t you think? And, I would submit, if there is to be any reconcilliation, both have to realize that they have had a part in how they got to where they are.
Note, I am not susggesting that there is not more fault on one side than the other. But I am suggesting that both sides have been at fault, and if there is to be reconcilliation, both sides have to recognize that and act accordingly.
Your comment that the wife alone committed the sin is a legalistic view of sin that implies, underneath it, that such actions are essentially created in a vacuum, not in a real, life and blood situation called marriage. Mariage is not a contract, it is a covenant, and that is far different than a contract. A contract requires that one party do something before the other party is obligated to act, and further implies that the obligation to act, on the second party’s part, is limited to the extent of the act by the first party…