A sin after a feigned repentance from sin is just another sign of the death you experienced at your first sin.
Those not dead to sin commit sin.
It is written..."Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness? (
Rom 6:16)
It is written..."So then they that are in the flesh cannot please God.
9 But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his.
10 And if Christ be in you, the body is dead because of sin; but the Spirit is life because of righteousness." (
Rom 8:8-10)