Celebrity Celebrity Moms Olivia Wilde and Jason Sudeikis Are "Top Notch Swim Coaches" for Son Otis By Lara Walsh Lara Walsh Lara Walsh is a Chicago-based writer and editor who covers all things fashion, celebrity, pop culture, travel, and food. When she’s not avidly planning her next trip, she’s writing posts for her travel blog or mapping out her next foodie adventure. InStyle's editorial guidelines Updated on July 20, 2016 @ 10:45AM Pin Share Tweet Email Photo: Daniel Zuchnik/Getty Learning how to swim is a big milestone in any kid's life, and Olivia Wilde and Jason Sudeikis decided to show their 2-year-old son, Otis, the ropes while catching some sun in their pool Tuesday. "Top notch swim-coaches," the 32-year-old actress captioned an adorable Instagram shot. In it, the expectant mom bares her growing baby bump in a red bikini and relaxes on a watermelon float while her 40-year-old comedian husband—stomach down on a flamingo float and dressed in red swim trunks—plays with their little boy. While it looks like young Otis is getting the hang of navigating the water, something tells us that the soon-to-be parents of two perhaps didn't expect him to get in the pool. Instead of a swimsuit, the tot is dressed in a blue-and-white-striped T-shirt and blue shorts as he wades on a step. Olivia Wilde Shows Off Her Baby Bump and Cooking Skills The couple first announced that they are expecting their second child in April with a sweet black-and-white mother-son Instagram shot of the brunette beauty and her son cradling their bare tummies, which she captioned, "Matching baby bumps."