This is a polite way of speaking of sexual relations. You may have to use other words in your translation. Alternate translation: "has sexual relations with it" (See: [[rc://en/ta/man/jit/figs-euphemism]])
The word "blood" here is a metonym for the guilt of putting someone to a violent death. See how you translated similar words in [Leviticus 19:9](../19/09.md). Alternate translation: "the guilt for their violent death is theirs alone" (See: [[rc://en/ta/man/jit/figs-metonymy]])