The fact that Cain was scared for his own life after he killed Abel (Genesis 4:14) indicates that there were likely many other children and perhaps even grandchildren of Adam and Eve already living at that time. Cain's wife (Genesis 4:17) was a daughter or granddaughter of Adam and Eve.
Ang katotohanang natakot si Cain para sa kanyang sariling buhay dahil baka patayin din siya ng ibang tao matapos niyang patayin si Abel (Genesis 4:14) ay nagpapakita na mayroon pang ibang mga anak o hindi kaya ay mga apo o apo sa tuhod sina Adan at Eba noong mga panahong iyon.