How long would you have been fooled by this woman?

This woman claimed to be pregnant with quintuplets by her boyfriend. Thirty weeks later, there were no babies. I keep thinking there had to be some red flags up at some point that the pregnancy was a hoax. I would have been especially suspicious if she made it over thirty weeks with no problems while pregnant with quintuplets.

So when would you have figured out the pregnancy was a hoax? How long would you have gone along with it?