By eating the Forbidden Fruit from the Tree of Knowledge of Good and Evil in the Garden of Eden, Eve - in essence - stuck her right-handed 3rd finger up to God in greedy-for-sexist-power-and-knowledge defiance against the Lord. By eating the Forbidden Fruit from that Tree which his wife gave him, Adam also - in essence - stuck his right-handed 3rd finger up to God in wimpish-people-pleasing defiance against God.

Notice that - at the time - there was nothing evil in the environment to put them under duress and force them to sin against their wills and better judgment. Even the Serpent did not order them to eat of the Forbidden Fruit, but merely uttered half-lies (NOT half-"truths") to entice Eve to deliberately disobey God's expressed command.

Satan, who previously had been thrown out of heaven along with his demons during his war of rebellion against God's mighty angel Michael and the holy angelic hosts, was already The Tempter, Deceiver, and Father of Lies when he spoke to Eve as a Serpent.

The punishment for disobedience against all three (e.g. Satan, Eve, and Adam) was THE ultimate physical punishment: DEATH (starting from that moment on with aging, beginning of diseases and handicapping accidents, and culminating in eventual complete mortal death against both Eve and Adam, plus prophetic promise of Satan someday beginning to burn in the Outer-Darkness Lake of Fire forever).

But - unlike the Devil who had past the point of no return and was already irrevocably cursed - was the sin of Eve and Adam an expression of malicious and non-relenting hatred against God.....or instead a temporary being-lied-to mistake they would not simply regret and feel sorry for, but seek forgiveness and remedy for?

The LORD - in pity - realized the danger of allowing Lucifer to cause both Eve and Adam to stumble plus our ancestral parents' consequential plight, and thus He compensated with His own sacrificial provision for their one-more-chance justification through atonement and rectification He provided by dying on a cross followed by resurrection a few thousand years later in the person of His Son, Jesus Christ.