Serena Williams has that pregnancy glow! The tennis champion took to instagram to share some photos from a recent relaxing day on a boat. The mom to be cradled her growing baby bump in a black swimsuit in the recent social media post. In April, Williams announced her pregnancy on snap chat, four months after she and fiancee Alexis Ohanian revealed their engagement. Last weekend, she and her friends and family celebrated her upcoming wedding with a bridal shower in Miami, Florida.