A question in the language of Genesis, Chapter 4

Hello Rabbi
God says to Cain, "If you work the ground, it will not give you more strength. You will be a wanderer and a fugitive on the earth." And Cain replies, "My poverty is greater than I can bear. You have driven me out this day from the face of the earth and from your presence, Esther. I will be a wanderer and a fugitive on the earth, and all who have me will kill me. "
Could it be that between the lines the Torah reveals that there were other people who lived in the world besides Adam, Eve, and Cain?
Another verse that could strengthen the question comes immediately after: "And Cain knew his wife…"