I'm not putting you on at all, honestly. To me, at least one of the people involved here is imaginary. If it's the woman, then the man is probably fantasizing about an adulterous context at least, but if you recall, the frame of reference through which I view adultery sees only the implied deception of removing the wedding ring (two deceptions maybe; the attempted one of the man involved, and hiding the action from a living husband as could also be inferred) as an actual wrong against anyone.

I think it's the ambiguity of "this sin" that's really opening up the variety of interpretations. In my worldview, to deceive another is the greatest sin of all. (I think I'm quoting someone, but I don't remember who.) However, in Christian interpretation, both adultery and suicide are sins as well, and most of the Christian faiths recognize contemplation of and desire to commit sinful acts as sins themselves.

I'm not saying I have anything against your interpretation. I'm just pretentious and egotistical enough to hold it as a mark of quality that it can evoke such completely different, yet still valid, meanings to different people who bring different viewpoints to the reading. ;)