Was Abraham's Relationship W/Hagar Adulterous?

[Rico]

Originally Posted by Falla39

Bro. Rico,

Yes, Cain slew (murdered) his brother, Abel.

I John 3 (NIV)
11This is the message you heard from the beginning: We should love one another. 12 Do not be like Cain, who belonged to the evil one and murdered his brother. And why did he murder him? Because his own actions were evil and his brother's were righteous. 13Do not be surprised, my brothers, if the world hates you. 14We know that we have passed from death to life, because we love our brothers. Anyone who does not love remains in death. 15 Anyone who hates his brother is a murderer, and you know that no murderer has eternal life in him.

These verses compares those who do not love his brother to
Cain (murderer). Serious business I would say!

Blessings,

Falla39

Ok. For a minute I thought the forum had lost its collective mind or something. If it was a sin when Cain murdered Abel then that means murder was already established as sin in the mind of God, regardless of whether He had given man the Law yet.

With that out of the way, does that mean that what Abraham did with Hagar was the sin of adultery in the mind of God, even though He didn't punish them for it at the time?