Where are you getting this from? The Bible doesn’t tell us anything about why Adam ate the fruit. This is purely imagination.
it's speculation that fits the facts, the facts being that Adam's punishment was harsher, and Messiah would not come through him but Eve, the sin was laid on Adam not Eve, and God in His wisdom before the fall created marriage, then after the fall, in the New Testament, God is abolishing Marriage, with the language at the beginning of the curse explaining that the punishment was for Adam listening to his wife.
Note that in the passage, Eve does not specifically tell Adam he won't die, nor does Adam confront her about it. She gives it to him, he eats. There was no tricking or deceiving.
Compare the two pronouncements
Genesis 3
11 And he said, Who told thee that thou wast naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat?
12 And the man said, The woman whom thou gavest to be with me, she gave me of the tree, and I did eat.
First, Adam blames his wife, but nothing about her deceiving him, just she gave it to him, and he ate.
13 And the Lord God said unto the woman, What is this that thou hast done? And the woman said, The serpent beguiled me, and I did eat.
Eve blames the serpent, that she was tricked, that she had been deceived into believing something incorrect.
14 And the Lord God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go, and dust shalt thou eat all the days of thy life:
15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
God assigns the most responsibility for Eve eating.. to the serpent. cursing the serpent worse out of the two, and a promise of future redemption to the woman.
16 Unto the woman he said, I will greatly multiply thy sorrow and thy conception; in sorrow thou shalt bring forth children; and thy desire shall be to thy husband, and he shall rule over thee.
She is still punished as she still did wrong. But with a promise of redemption and vengeance, I would say it is a lighter punishment.
17 And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life;
18 Thorns also and thistles shall it bring forth to thee; and thou shalt eat the herb of the field;
19 In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return.
Adam's curse is far more far reaching than either the serpent (the curse was only on himself and other serpents) or Eve (curse on her and other human women, that childbirth will be painful (more so than for other animals)).. the curse on Adam.. cursed the entire planet. Adam is being put to blame for sin and death entering the world, Paul echoes this in Romans 5.
It was Adam's sin, not Eve's sin, even though Eve ate first, the responsibility was heaped on Adam.
the first thing God convicts Adam of is not eating the fruit.
but listening to his wife.
which yes, it is me inferring that Adam valued his wife over God, and that was the true real sin, but it fits the facts, and explains why Adam's responsibility was so much higher.
if Adam was duped, then ultimate blame would all fall on the serpent, not Adam, as blame for Eve eating DID fall on the serpent.
But Adam was held fully accountable to the point that it cursed all creation.
Something far more serious than being duped would suggest.
But if Adam valued Eve more than God? It explains Adam's ultimate responsibility, it explains the end of marriage,
