<human>: Can you provide a brief overview of the text?

My girlfriends sister, 16, convinced a 22 year old to date her. Using a fake fb account she changed her birth year to seem like she was 20 and told him that she works at the school she is actually attending. She also told him that she had been raped about 2 years ago and is now raising a 1 year old baby. The baby turned out to actually be a project in her child development class that she took over a year ago... She talked to the dog while on the phone with him to simulate talking to a baby. All of her posts in the fake fb account talk about the baby. When he came to visit her at her house she told him it was a friends house that she was moving into it in a month or two. When me and my girlfriend contacted the guy to tell him what was really going on he said that she had told him she graduated a year before him and that he knew her from high school; she is a sophmore now and he has been out for 4 years...
<bot>: girlfriends underaged sister convinced a 22 year old to date her and believe she was raising a baby that was actually a school project last year