https://www.mercurynews.com/2019/04/08/serena-williams-might-have-mistakenly-revealed-the-gender-of-meghan-markles-baby/

Serena Williams might have been a gender reveal party of one with a slip-up that some suspect exposed that William and Meghan Markle are having … a girl!

Of course, the prince and the duchess have said that they themselves don’t know the gender of their first child, but a lot of people — particularly bookies — are putting credence into Williams’ slip of the tongue.