It's pretty drama in my opinion.... but it is indeed highly
believable.
Scanning through the thread, the story reminds me of a female
friend of mine who met a guy on Friendster. Long story short, they
went out on the first date, went back to his house, one thing led
to another, and they.... did it.
A few weeks later, the girl realises that she had missed her period
for three days. She panics, contacts the guy, and the bloody farker
instantly cuts off all contact with her. 
In desperation, she seeks my advice, and I tell her to wait three
more days before taking a pregnancy test. Even so, she was still
highly agitated, for she insisted that her cycle was clockwork and
that it had never come late.
Luckily for her, it came the very next morning. Phew....
