Ashlee Simpson expects to give birth to a baby boy in November, according to her rock star boyfriend Pete Wentz.Just days after the pair was forced to deny rumours Simpson is pregnant with twins, the Fall Out Boy star has revealed all to Playboy magazine.He says, "We know with 90 per cent accuracy that it's a boy, and our due date is around Thanksgiving."But Wentz insists they couple hasn't started thinking about names yet: "My friend Andrew said, 'Your kid has to have a name that would fit either a rock star or a senator.'"