Prince William and Kate Middleton’s three children may soon have a new baby cousin: Pippa Middleton is reportedly pregnant, according to People.

The news comes right as her older sister Kate gave birth to her third child (a son!) Monday.

This would be the first child for Pippa and her husband, James Matthews.

Pippa’s baby news was first shared in UK tabloid The Sun on Saturday, according to People, and has since spread to numerous other papers. Pippa’s rep declined to comment on the pregnancy rumors to People.

The 34-year-old book author and her 42-year-old hedge fund manager hubby may have had parenthood on their minds for a while now. Prior to their May 2017 wedding, they were apparently looking forward to settling down and “having children and leading a quiet life,” a source told People at the time.

Prior to their marriage, the couple had a high profile on-again off-again courtship that began in 2012 (although they've known each other since 2007), according to Town & Country. The two are a sporty couple who the paparazzi has snapped skiing, biking, and running together.

Any children of Pippa's will have automatic playmates in their royal cousins: Prince George, Princess Charlotte, and the new baby boy born on Monday. (Can't wait for that family photo!)

The only black cloud hovering above all the joyful news is that Pippa’s father-in-law David Matthews was arrested by French police in March—he’s been accused of sexually assaulting a minor in the 1990s, according to The Telegraph. David has denied all allegations.

Congratulations, Pippa and James!