A
Alabaster
Guest
For something to be a "sin", God has to have told us that it is a sin in His word (either directly or at least clearly in principle.) There is no sin of "living together" in the true sense of those words ever mentioned. Of course, in today's English we have assigned a sexual connotation to those words that was not originally there when we refer to a straight man and woman or a homosexual couple. But there is no sin whatsoever in just the act of two people (even if they are a straight man and woman) living in the same dwelling. It doesn't matter how many people say something is a sin. If God didn't tell us it is sin, we have no right to make it a sin.
Is it the best idea to do this if you believe that sex outside of marriage is a sin and the other person you are living with is someone you are sexually attracted to? Probably not! But not being a good idea, in and of itself, doesn't make it a sin against God. I can envision many hypothetical situations where two sexually attracted people may find themselves living together where it may be the only practical solution for them. In and of itself, this is not a sin any more than it is for two straight men or women to live together as roomates.
One thing you probably have noticed in Mexico is that it is very common for unmarried people (referring to abscense of either legal or church marriage) that are living together to tell everyone they are married and refer to each other as "My husband" or "My wife". This is only because the huge influence of the Catholic church in your country, and the shame they have put on unmarried couples in sexual relationships pressuring them to lie about it to avoid "the evil eye" from the people around them! Lying clearly is a sin in the Bible.
Living together as husband and wife, in a sexual relationship is a sin. Period. People are brazen about it today. They don't lie about it.
Many times I wonder if the woman at the well was doing the same thing. Perhaps this is an an additional aspect of the story. She was lying about her relationship. Jesus knew this, and was also condemning her for the sin of lying!
Jesus never condemned people!
John 3:17 NKJV
For God did not send His Son into the world to condemn the world, but that the world through Him might be saved.