Pete Davidson and Elsie Hewitt on vacation as they await their baby

Pete Davidson and Elsie Hewitt are enjoying a beach vacation as they prepare to become first-time parents, with Hewitt sharing photos of her developing baby bump on Instagram on Aug. 29. The images show the 29-year-old model and the 31-year-old comedian relaxing on the water, kayaking, snorkeling, dining outdoors and posing in swimsuits, including several shots that deliberately highlight Hewitt's pregnancy. In one playful image Davidson appears to tuck a backpack under his shirt as if mimicking a bump, and Hewitt captioned the post, "Coupla silly geese on vacashon," adding in a comment, "Ngl i think the bump is mostly bloat."

The couple first began publicly appearing together in March and made a more formal outing on the red carpet in May. They were also photographed courtside together at an NBA playoff game that month. Media reports and the pair's own posts indicate Hewitt confirmed she is expecting in mid-July with a social-media carousel that included an ultrasound image and a candid caption: "Welp now everyone knows we had sex." Some outlets have placed the confirmation in June, and accounts of the exact timing vary.

Davidson has spoken publicly about the emotional and...