It's just natural instinct. What's a girl to do?
16 Then came there two women, that were harlots, unto the king, and stood before him.
17 And the one woman said: 'Oh, my lord, I and this woman dwell in one house; and I was delivered of a child with her in the house.
18 And it came to pass the third day after I was delivered, that this woman was delivered also; and we were together; there was no stranger with us in the house, save we two in the house.
23 Then said the king: 'The one saith: This is my son that liveth, and thy son is the dead; and the other saith: Nay; but thy son is the dead, and my son is the living.'
24 And the king said: 'Fetch me a sword.' And they brought a sword before the king.
25 And the king said: 'Divide the living child in two, and give half to the one, and half to the other.'
26 Then spoke the woman whose the living child was unto the king, for her heart yearned upon her son, and she said: 'Oh, my lord, give her the living child, and in no wise slay it.' But the other said: 'It shall be neither mine nor thine; divide it.'
27 Then the king answered and said: 'Give her the living child, and in no wise slay it: she is the mother thereof.'