God would not be justified in exacting a negative consequence on Adam and Eve if it was He Himself who forced the fall of Adam and Eve. Surely Adam and Eve were give their free will to choose whether to partake of the fruit or not. Adam and Eve did not fully understand the consequences of their actions but they certainly had the will to do what the chose to do. Eve believed the serpent and had a desire to become like God. That was not a lie. However, she had never experienced death before so she didn't fully understand what that actually meant. She also had not experienced a liar and perhaps did not realize that she was being deceived. She simply believed the serpent over God and chose of her own free will and choice to partake of the forbidden fruit. She then got Adam to also partake of the fruit.
God knew this would happen and had already provided a Savior for fallen man even before the earth was created. Adam and Eve were given the knowledge of good and evil and had become like God in this respect. But death also came upon them and their future posterity.
Jesus Christ's atonement atones for original sin. We are not held accountable for the fall of Adam. Because of this, all mankind who come to this earth will be resurrected and live forever in their resurrected bodies.
1 Corinthians 15:22
22 For as in Adam all die, even so in Christ shall all be made alive.
God cannot do evil. But everybody does His will. Even including the serpent., which it doesn't even know.
God told them to be fruitful and fill the earth. But we will need the spirit of lusting in order to do that. Sexual immorality is a sin. But God cannot give us that spirit.
When I was a child, having sex never crossed my mind. That the desires had came to me later on in life. But God needed Adam and Eve to start procreating.
It is hard for a parent to teach their children about the birds and the bees. And so God had the serpent to do it for him. He knows that the serpent will oppose Him. And so when God want it to go low, That God will tell it to go high. Like in the book of Job explains the tactics God uses on the serpent.
And so the fruit have gave the couple knowledge of good and also of wickedness. That they had started desiring one another, and having the knowledge of knowing where to place things. But during this period, God turns away. But He had sanctified the bed that it said in the scriptures., and so what ever He cleansed, we eat.
But the serpent didn't know that it was doing God's will. That is one of God's command to filled the earth. And that is why they had made it a top priority. That one of the reason that it said in the book of Jasher the reason why He flooded the earth.
Genesis 19:32
Let’s get our father to drink wine and then sleep with him and preserve our family line through our father.”