Ok. But as long as the “second marriage” is not a true marriage, sex within such marriage is an action that should be avoided and that is a sin in case one is culpable.
Even if such a situation happens (though i am a bit pressed to come up with such a situation in which both in the “second marriage” are catholics and have intent to avoid the sin), that does not change that one must have intent to at least try. Just because it might be actually impossible to do what is right, does not change that one should still honestly and faithfully try.
I can come up with scenarios at least possibly being that in which only one spouse is trying to live as catholic with the other not trying or not being catholic at all and being to some extent not helpful (e.g. “Sex or divorce and i take the children” could reduce seriously the ability to act freely with the one adressed such way and could be expected beforehand).
But i come up empty with a couple with both trying to live as catholic; trying and failing, yes; but not prior certain knowledge of impossibility; they are both willing, so with a combination of seperate beds, locks, chastity belts, fleeing into another room for prayer and careful choice of clothing there should be a non-zero chance to not fail daily.
I do not think this is that relevant for the problem of intent to sin no more. Because to avoid sin, the person in questions needs to be told, what sin is; so the “second marriage” spouse will get the information one way or another, that since its no true marriage, no sex should actually take place; and then the person knows that any sex is at least potentially a sin and should have therefore have intent to avoid at least that sex, that is actually a sin.
So we still end with only having valid confessions if the person has some intent to avoid the sex within the “second marriage”; if person fails, confession is still possible; but the intent to avoid has to exist.
I agree. But that does not change that for confession we must have intent to avoid sin, for which we might have to engage those “secondary unfreedom’s” to overcome them hopefully. Often we’ll fail; but without intent, it does not work.
I cannot see such a situation for two catholics both with intent to avoid sin. Cause why should they split up, if both are willing to avoid sex if that can be somehow achieved and try hard?
And i am realy creative, when it comes to crazy and unusual scenarios; but here i come up empty; even if one has so to say uncontrollable urges, there is always masturbation, then at least one avoids sin for one spuse (which then can refuse without serious harm); and if both have uncontrollable urges then individual masturbation would usually lead to sin less often (as it is highly unlikely of uncontrollable urges being perfectly in sync).