A Seductive Fantasy

Is it wrong that I indulged in sexual fantasies involving a woman who had a romantic partner?

Absolutely, yes.

Did I violate the biblical commandment "thou shalt not commit adultery?"

Technically, no.

Was I tempted and consumed by the cardinal sin of lust?

Of course.

Am I sinful for succumbing to these desires?

Unequivocally, yes.

Now I intend to repent for my vile sins and seek forgiveness from the Lord.