I’ll go to your ‘original’.
Look at it this way. If person A tells person B a lie. . .person A has already ‘weakened the relationship’ between them. Just because person B doesn’t ‘know’ it doesn’t mean it didn’t happen.
So person A makes reparation, and confesses the truth. In an ideal world, person B would recognize this confession to be a **repairing **of the relationship that person A had damaged (knowingly) and person B had **not known. **Of course, person B would understandably feel hurt that person A had not ‘trusted’ person B enough to tell the truth in the first place, and that ‘consequence’ is going to have to be dealt with. Remember, when person A and person B die, that lie is going to ‘come out’. . .and person A is going to pay reparations then. Person A will be a lot better off if he has paid some of those reparations already on earth by admitting the truth. And person B has the opportunity to exercise his own ‘forgive as we forgive those who sin against us’ if he hears the truth from person A. If person B has trouble with that on earth. . .he’ll have the same trouble in heaven. But at least before death he’ll have the chance (hopefully) to have the time to accept the confession and to forgive.
I really cannot think of a situation where, ultimately speaking, meaning with the idea that ultimately what we should be doing is God’s will (which means not lying to people, among other things), there would be situations where we should** not **be not only confessing our lies, but trying to do whatever reparation we can here on earth.
For the second slight difference: Are we (as a general rule) trying to do ‘only’ the bare minimum and to look for every possible loophole or scenario to justify our original actions or excuse them. . .or are we supposed to imitate Christ and try to do what HE would do–which is always more than the minimum and on the maintenance of truth and one’s relationship with God above all? The answer to that will tell you whether or not one should make it a general rule to ‘confess’ a lie (under all circumstances) and what kind of reparation to offer.
That being said, please realize that I’m as imperfect as anybody else (more so) and I’m still working on exactly this problem. Of course it’s hard. . .but losing heaven because I’m more attached to having people keep their good opinion of me which they got because I lied, fudged, ‘fibbed’, etc. instead of accepting their justifiable hurt and even anger over my lying, fibbing etc. in the first place. . .would be a ‘hell’ of a lot harder, IMO.