In the first few chapters of Genesis, we see God create Adam and Eve and then tell them to reproduce.
28 Then God blessed them and said, “Be fruitful and multiply. Fill the earth and govern it. Reign over the fish in the sea, the birds in the sky, and all the animals that scurry along the ground.”
Then the Fall happens and Adam and Eve are banished from the Garden. The very next verse is them having sex.
Genesis 4:1 (NLT)
4 Now Adam had sexual relations with his wife, Eve, and she became pregnant. When she gave birth to Cain, she said, “With the Lord’s help, I have produced a man!”
To me, this seems to imply that Adam and Eve never had sex while in Eden, which would imply that they Fell rather quickly (like, a day or two). However, this contrasts with the serpent's use of the phrase "one day" in Genesis 3:1. Hence, I'm asking: is this implication that Adam and Eve didn't have sex until after the Fall one that's actually supported by the text?