Straight Male / 18
I masturbated to porn and had sex with my sister,...god please forgive me
If god didn't want you to enjoy porn or enjoy sex he wouldn't give you the feelings of enjoyment. As for having sex with your sister....did she enjoy it? If so no problem.
Hell, who had sex with Eve in the Garden of Eden? Who had sex with who to start mankind? If you believe in the Bible, you believe in i****t.
God and sin are just human inventions. You only have to forgive yourself if you feel that is necessary. Unless you forced your sister into sex, you didn't do anything most guys wouldn't do.