Denial of initiation

It is written in the verse, "And the king said, 'This means, this is my son, the living, and my son, the dead.' This means, no, but your son, the dead, and my son, the living.'" And in the Ketubot, Rav Sheshet said, "This means, denial is the beginning of the conspiracy." That is, this woman who denies her companionship is the beginning of the conspiracy, since these women engaged in fornication, and it is difficult for me, after all, women are disqualified as witnesses?