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Did Adam and Eve’s children commit incest?

Q: Was there ever any incest in order for us all to be here from Adam and Eve?

A: Yes, Adam’s children married each other. But incest was not viewed as a forbidden activity until the time of Moses. See Leviticus chapters 18-20. Adam and Eve’s children married their brothers and sisters. Even Abraham married Sarah, who was his half-sister (Genesis 20:12). For further reading see Where did Cain get his wife?