The Bible isn't based on my assumptions or anyone else's assumptions. The Bible consists of God breathed scripture. You said that Eve had a choice of listening to the voice of God. What SCRIPTURE tells us that?
Anyone can assume anything at anytime. That is why cults and false doctrines proliferate.
You must be assuming Adam told her since scripture doesn't say anything about who told her what to answer the serpent... and I assume, therefore your are implying that God did not speak to Eve except to address her having eaten,? since that is the only scriptural account of Him speaking to her? and although there is no scriptural account of adam doing so? Personally, I hope to be more careful in assumptions that might mischaracterize God.