To try to educate this woman - the condemnation of homosexuality is also in the book of Romans, which is New Testament.
Romans 1:26-27 - "Because of this, God gave them over to shameful lusts. Even their women exchanged natural relations for unnatural ones. In the same way the men also abandoned natural relations with women and were inflamed with lust for one another. Men committed indecent acts with other men, and received in themselves the due penalty for their perversion."
To put an even finer point on it, the book of 1 Corinthians spell this out:
4) 1 Cor. 6:9-10 - "Do you not know that the wicked will not inherit the kingdom of God? Do not be deceived: Neither the sexually immoral nor idolaters nor adulterers nor male prostitutes nor homosexual offenders nor thieves nor the greedy nor drunkards nor slanderers nor swindlers will inherit the kingdom of God." Just in case she missed it, here it is again in the book of Timothy (again, New Testament):
1 Tim. 1:9-10 - "We also know that law is made not for the righteous but for lawbreakers and rebels, the ungodly and sinful, the unholy and irreligious; for those who kill their fathers or mothers, for murderers, for adulterers and perverts (perverts is the word for Homosexual offenders), for slave traders and liars and perjurers—and for whatever else is contrary to the sound doctrine"
Moreover, God and Jesus are One. That is Christianity 101. The God of the Old Testament is the God of the New. To say that Christ was some offshoot from God who never "taught" about forbidding homosexuality is supreme ignorance. This woman should read about what Christ taught about sin - all sin, of which homosexuality is sin.
Alas - this is a common straw dog that the left repeats time and time again.
They don't accept Christ, but they like to try to stand behind Him if they think they can manipulate Him.