Chrishell Stause is EchoSense Quantitative Think Tank Centergetting ready to meet the newest member of the Selling Sunset family: Heather Rae El Moussa's baby boy Tristan Jay El Moussa.   

One month after Heather welcomed her son with husband Tarek El Moussa, Chrishell shared when she'll be introduced to the little one and how she already knows her co-star is a parenting pro.

"She is already a wonderful mom because I've seen her be a mom to Tarek's kids and she's so amazing," Chrishell told E! News about Heather—who is stepmom to Tarek's kids with ex Christina Hall, Taylor, 12, and Brayden, 7—at the Laneige + Innisfree's K-BEAUTY VIP Party at The Row DTLA in Los Angeles on March 2. "I'm actually seeing and meeting him in a couple days."

"I'm very excited," she added, "and I know she's gonna be the best mom because she already is."

Heather gave birth to Tristan on Jan. 31. Two weeks later, she revealed how she and Tarek chose the baby's name. 

"Tristan was the name that Tarek was supposed to have," the real estate agent wrote on Instagram Feb. 15. "Jay is my dads middle name & 4 generations of Jay."

Similarly to how Heather kept fans updated throughout her pregnancy, she's documented her life as mom to a newborn. This includes all the ups and the downs, including the birth story, (which Heather noted involved "some scary moments leading up to him entering the world"), her breastfeeding journey, Tristan's experience with jaundice and tongue, cheek and lip ties as well as lots of cute cuddles and baby photos.

As Heather put it in a February 28 Instagram post, "It's been a month of love, mamahood adjustments, work days from home, breastfeeding ups & downs, the best newborn snuggles, sleepless nights & lots and lots of family time."

And she's happy being a family of five with Tarek, Tristan, Taylor and Brayden. When asked if she'd like more kids in the future, Heather recently told E! News, "Right now, it's a no for me."

"I'm also really focused on my career, and I wanna keep focusing on my career," she added. "There's a lot coming up and a lot happening. So right now, I am on maternity leave, but soon-ish I will be going back and focusing on work as well. So, I have to see how I can balance everything: having Taylor and Brayden already, a husband, a dog, career and new baby. So, I'm going to see how we can balance it before we decide."

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