I don't think that this is a paradox. It sounds like one. The word "guess" doesn't belong because there is nothing to guess about. This is more like an 'Honestant and Swindicant' problem becuase the mother either says "crocodile gives the child back" and the croc does it or the croc "deceives" the woman and eats the child.
if you look at the so called paradox it says if you dont guess his fate, ill eat him, so as long as you provide a guess you'll get him back either way, because any guess is a correct guess but if you stay silent and not provide an answer then your screwed lady
the paradox is that she say you will eat my child. if he eats her she is correct if he dosnt she is incorrect