2 Samuel 16:20 Meaning

18And Hushai said unto Absalom, Nay; but whom the LORD, and this people, and all the men of Israel, choose, his will I be, and with him will I abide.

19And again, whom should I serve? should I not serve in the presence of his son? as I have served in thy father's presence, so will I be in thy presence.

20Then said Absalom to Ahithophel, Give counsel among you what we shall do.

21And Ahithophel said unto Absalom, Go in unto thy father's concubines, which he hath left to keep the house; and all Israel shall hear that thou art abhorred of thy father: then shall the hands of all that are with thee be strong.

22So they spread Absalom a tent upon the top of the house; and Absalom went in unto his father's concubines in the sight of all Israel.