Heather Rae Young and her husband Tarek El Moussa took to Instagram on Saturday to share a photo of themselves in the hospital on the day their baby was born.In the photo, the 35-year-old reality star was laying down in a hospital bed while the investor, 41, held her hand right before she gave birth to their baby boy, whose name has not yet been revealed.The couple — who have been married since 2021 — welcomed their first child on January 31.Their baby boy is the Selling Sunset star's first child while the HGTV Flip or Flop alum has two other children — Taylor, 12, and Brayden, seven —with his ex-wife Christina Hall. The caption of their shared post read: 'The day our whole world changed.' Before the delivery: Heather Rae Young, 35, and her husband Tarek El Moussa, 41, took to Instagram on Saturday to share a photo of themselves in the hospital on the day their baby was bornWhile laying in the hospital bed, the former Playboy model looked casual and comfortable in a loose, gray T-shirt.She tied her blonde tresses back into a low ponytail and opted to go makeup-free to showcase her natural beauty.By her side, her husband wore a light gray T-shirt and black sweatpants.He also sported a black cap and a matching zip-up hoodie.The pair held hands and appeared to be sharing the excitement ahead of welcoming their baby.Earlier this week, Tarek shared a photo of their newborn son.'Our baby boy is here,' he wrote in the caption. 'Mama and baby are happy, healthy, tired but doing well.