A rep for Kate Middleton addressed the swirling rumors about her well-being and whereabouts following the Princess of Wales’ abdominal surgery in January, RadarOnline.com has learned, confirming she is doing “well.” Kate’s last public engagement was Christmas Day, when she stepped out with husband Prince William and their three children: Prince George, Princess Charlotte, and Prince Louis. Kensington Palace had shared in the weeks afterwards that Kate would not be involved in any royal engagements until after Easter. “Kensington Palace made it clear in January the timelines of the princess’ re…