She has kept mum on the identity of the father of her unborn child. But it seems her silence may be contributing to the intense rumours surrounding the paternity of X Men star January Jones's unborn baby. But while the film's producer, and supermodel Claudia Schiffer's husband, Matthew Vaughn, has been named among the potential dads-to-be he has denied the claims. The director's no-show at a recent screening sent online commentators into a frenzy, suggesting the reason behind his no-show was the speculation. According to E! Online, Vaughn, director of her new movie X-Men: First Class had a 'very close' relationship with the actress on set. The article alleges Vaughn 'abruptly' left town at around the same time Jones made her surprise baby announcement in April even though he was scheduled to stay for another month. The report was picked up by the New York Daily News and several other news outlets, although it is no longer visible on the website. While the Mad Men actress, 33, has yet to reveal the identity of the baby's father, some have said it could be an ex, while others have speculated Jones is keeping the name of her baby's father a secret because he is not a single man.