Actually, it was Adam listening to Eve instead of to God:
True.
However, this is NOT the "original" sin.
Before Adam listened to Eve rather than God, Eve listened to Satan and decided for herself to eat the fruit, WITHOUT discussing this with her husband, Adam, first.
However, this is NOT the "original" sin, either.
Before Eve was deceived by Satan, Satan usurped God's headship, disobeying Him in order to be "like" Him, a god.
However, this is NOT the "original" sin, either.
Before Satan acted on his desire to be "like" God, He coveted what was not his- God's worship for Himself.
THAT was the original sin- covetousness.
BA