dino maglio has been sentenced to six and a half years in jail .
he offered the teen , her mother and her sister a place to stay at his flat .
they came into contact with him in italy via the couchsurfing website .
he spiked a glass of baileys liqueur the girl was drinking .
he admitted drugging the 16-year-old but claims the sex was consensual .
maglio was ordered to pay $ 83,000 to the victim and $ 20,000 to her mother .
more than a dozen women have come forward claiming he assaulted them .