my sister is obsessing about palin's 5th pregnancy

was it really her's or her daughters? According to my sister either Palin is nutso or she's lying. Supposedly her water broke a month early, she knew the baby was down's syndrome already, she boarded a seven hour flight then drove to her town to deliver. Also mysteriously her daughter was out of school for 5 months during that time with 'mono'. Hmm?