Born again believers do sin and here is what God said about it. Do not think you will be able to live a lifestyle of sin and God will merely wink at it.
1 Corinthians 6:9-11
"Or do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived: neither the sexually immoral, nor idolaters, nor adulterers, nor men who practice homosexuality, nor thieves, nor the greedy, nor drunkards, nor revilers, nor swindlers will inherit the kingdom of God. And such were some of you. But you were washed, you were sanctified, you were justified in the name of the Lord Jesus Christ and by the Spirit of our God."
Romans 6:1 "1 What then shall we say? Shall we continue in sin so that grace may increase? 2 Certainly not! How can we who died to sin live in it any longer?…"
God disciplines those He loves, therefore Christians do sin but they don't like it, are convicted by the Holy Spirit, and eventually confess to be cleansed.
Hebrews 12:5-7 "…5 And you have forgotten the exhortation that addresses you as sons: “My son, do not take lightly the discipline of the Lord, and do not lose heart when He rebukes you. 6 For the Lord disciplines the one He loves, and He chastises every son He receives.” 7 Endure suffering as discipline; God is treating you as sons. For what son is not disciplined by his father?…"
1 John 1:9
"9 If we confess our sins, He is faithful and righteous, so that He will forgive us our sins and cleanse us from all unrighteousness."
Romans 7:15-20
"15 For I do not understand what I am doing; for I am not practicing what I want to do, but I do the very thing I hate.
16 However, if I do the very thing I do not want to do, I agree with the Law, that the Law is good. 17 But now, no longer am I the one doing it, but sin that dwells in me.
18 For I know that good does not dwell in me, that is, in my flesh; for the willing is present in me, but the doing of the good is not.
19 For the good that I want, I do not do, but I practice the very evil that I do not want.
20 But if I do the very thing I do not want, I am no longer the one doing it, but sin that dwells in me."
Those who live a lifestyle of sin and defend it are not born again. A born again believer will be ashamed when they are confronted about their sin, eventually, they will confess it to be cleansed.
1 John 3:8-10 "…8The one who practices sin is of the devil because the devil has been sinning from the very start. This is why the Son of God was revealed, to destroy the works of the devil. 9Anyone born of God refuses to practice sin because God’s seed abides in him; he cannot go on sinning, because he has been born of God. 10By this the children of God are distinguished from the children of the devil: Anyone who does not practice righteousness is not of God, nor is anyone who does not love his brother.…"
If someone chastises you for correcting their sin attitude, then they are probably not saved.