2 And the woman said to the serpent, “We may eat the fruit of the trees of the garden; 3 but of the fruit of the tree which is in the midst of the garden, GOD has said, ‘You shall not eat it, nor shall you touch it, lest you die.’
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She didn’t say “Adam told me God said…”
Adam was not deceived. This means he KNEW what God said was true, and that he would die. This indeed makes his sin graver, however KNOWING that this was the result of his sin, he STILL chose to accept the same fate as Eve.
Once he did that, his mind was altered, as overwhelming fear took over, as he now existed in a fallen, corrupted state, and he BLAMED his wife.
So we have to look at what his motivation was to be disobedient, BEFORE he disobeyed, and sinned.