Prince William's wife Kate Middleton is reportedly confirmed pregnant with third baby and Pippa Middleton is not happy about it! (Photo: Ben Curtis/AP/Pool/Getty Images) Kate Middleton has been plagued with several nasty rumors ever since she first announced her relationship with Prince William. Now, new reports are claiming that the mother of Prince George and Princess Charlotte is confirmed pregnant with twins and is confirmed to become the next queen. Prince William's wife Kate Middleton confirmed pregnant with twins. GamenGuide has previously reported that Kate Middleton is pregnant.