audrey pekin says she was brutally raped while on family holiday to bali .
ms pekin claims she was raped by nigerian national henry alafu .
pekin family has questioned why mr alafu was not arrested by police .
` he went from a man to a monster , ' ms pekin says of her alleged attacker .
mr alafu allegedly raped ms pekin twice , once in a home and once in a cab .