What was the relationship between Eve and Cain?
Eve was the mother of Cain. When he was born, she said she had produced him with the help of God. Genesis 4:1
What the Bible says
Genesis 4:1
And Adam knew Eve his wife: who conceived and brought forth Cain, saying: I have gotten a man through God.
Douay-Rheims Bible (Challoner revision), public domain.
Did you know?
The name “Cain” sounds like the Hebrew word Eve said: “I have produced.” NABRE note on Gn 4, 1