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Port continued: "Everyone is so happy and healthy and we are home now. I'm going to try my very best to not be one of those moms whose feed is dominated by their baby but I can totally see how difficult it will be not to. I am beyond obsessed and in love and wish I could bottle this feeling for all of you out there."
See photos of Whitney Port:
LOS ANGELES, CA - OCTOBER 22: Tv personality Whitney Port attends the REVOLVE fashion show benefiting Stand Up To Cancer (SU2C) on October 22, 2015 in Los Angeles, California. (Photo by Donato Sardella/Getty Images for REVOLVE Clothing)
WEST HOLLYWOOD, CA - SEPTEMBER 17: TV personality Whitney Port attends Kari Feinstein's Style Lounge at Sunset Marquis Hotel & Villas on September 17, 2015 in West Hollywood, California. (Photo by Rebecca Sapp/WireImage)
CHICAGO, IL - AUGUST 14: Whitney Port attends Create & Cultivate's Fashion and Beauty Summit at W Hotel Chicago Lakeshore on August 14, 2015 in Chicago, Illinois. (Photo by Timothy Hiatt/Getty Images)
LOS ANGELES, CA - AUGUST 22: (L-R) Whitney Port and Lauren Conrad attend a private event at Hyde Staples Center hosted by Tommy Bahama during the Taylor Swift concert on August 22, 2015 in Los Angeles, California. (Photo by Jason Merritt/Getty Images for Tommy Bahama)
LAS VEGAS, NV - AUGUST 07: Television personality Whitney Port rides the High Roller during her bachelorette party at The High Roller at The LINQ Promenade by on August 7, 2015 in Las Vegas, Nevada. (Photo by Bryan Steffy/WireImage)
LAS VEGAS, NV - AUGUST 07: Television personality Whitney Port (CR) rides the High Roller during her bachelorette party at The High Roller at The LINQ Promenade on August 7, 2015 in Las Vegas, Nevada. (Photo by Bryan Steffy/WireImage)
NEW YORK, NY - MAY 14: Whitney Port hosts the Grand Opening of Mixology at Mixology on May 14, 2015 in New York City. (Photo by Dustin Harris/Getty Images)
LOS ANGELES, CA - MAY 07: Whitney Port attends Erin Wasson hosts dinner to launch collection for PacSun on May 7, 2015 in Los Angeles, California. (Photo by Charley Gallay/Getty Images for PacSun)
NEW YORK, NY - APRIL 30: Whitney Port gets styled for spring at British celebrity stylist Mark Hill's Master Class in celebration of Mark Hill Salon Professional's introduction to ULTA Beauty at The Glass Houses on April 30, 2015 in New York City. (Photo by Astrid Stawiarz/Getty Images for ULTA Beauty)
LOS ANGELES, CA - MARCH 20: Whitney Port arrives at Create & Cultivate's Speaker Celebration at The Line Hotel on March 20, 2015 in Los Angeles, California. (Photo by Jon Kopaloff/FilmMagic)
LONDON, ENGLAND - FEBRUARY 22: Whitney Port attends the ISSA Autumn/Winter 2015 Runway Show during London Fashion Week at One Great George Street on February 22, 2015 in London, England. (Photo by David M. Benett/Getty Images for ISSA)
LONDON, ENGLAND - FEBRUARY 21: Whitney Port attends the Julien Macdonald show during London Fashion Week Fall/Winter 2015/16 on February 21, 2015 in London, United Kingdom. (Photo by Mike Marsland/WireImage,)
LONDON, ENGLAND - FEBRUARY 21: Presenter Whitney Port attends the Lucas Nascimento show during London Fashion Week Fall/Winter 2015/16 at on February 21, 2015 in London, England. (Photo by Ian Gavan/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 10: Whitney Port (R) and fiance Tim Rosenman attend the Portsea Polo event at Point Nepean Quarantine Station on January 10, 2015 in Melbourne, Australia. (Photo by Graham Denholm/Getty Images)
MIAMI, FL - DECEMBER 04: MIAMI Whitney Port, an American television personality, fashion designer, and author, on the beach on December 04, 2014 in Miami Beach, Florida. (Photo by Fred Hernandez/BuzzFoto via Getty Images)
BEVERLY HILLS, CA - NOVEMBER 17: Whitney Port attends The CFDA hosts Soul Cycle Charity Ride in LA benefiting Fashion Targets Breast Cancer held on November 17, 2014 in Beverly Hills, California. (Photo by Michael Tran/FilmMagic)
WEST HOLLYWOOD, CA - OCTOBER 07: Whitney Port arrives for the Club Tacori Launch of Their Gentlemen's Jewelry Collection at HYDE Sunset: Kitchen + Cocktails on October 7, 2014 in West Hollywood, California. (Photo by Gabriel Olsen/Getty Images)
NEW YORK, NY - SEPTEMBER 16: Whitney Port hosts 'Building Your Professional Brand' Event at The Core Club on September 16, 2014 in New York City. (Photo by Nomi Ellenson/Getty Images)
NEW YORK, NY - SEPTEMBER 09: Whitney Port attends the Cynthia Rowley presentation during Mercedes-Benz Fashion Week Spring 2015 on September 9, 2014 in New York City. (Photo by Slaven Vlasic/Getty Images)
NEW YORK, NY - JULY 29: Whitney Port and Wedding Paper Divas unveil Whitney's bridal stationery collection at a rooftop event at the Mondrian Soho on July 29, 2014 in New York City. (Photo by Cindy Ord/Getty Images for Wedding Paper Divas)
WASHINGTON, DC - MARCH 21: Fashion Designer and TV Personality Whitney Port attends the Blo Blow Dry Bar 'Blo Dupont' opening hosted by Whitney Port and Maha Sharma at Blo Dupont on March 21, 2014 in Washington, DC. (Photo by Paul Morigi/Getty Images for Blo Blow Dry Bar)
WEST HOLLYWOOD, CA - FEBRUARY 11: Whitney Port (L) and Tim Rosenman attend Wedding Paper Divas Presents 'Whitney Port's Love Story' at Mari Vanna Los Angeles on February 11, 2014 in West Hollywood, California. (Photo by Michael Kovac/Getty Images for Wedding Paper Divas)
LOS ANGELES, CA - JANUARY 10: TV Personality Whitney Port attends Diane Von Furstenberg's 'Journey Of A Dress' Premiere Opening Party at Wilshire May Company Building on January 10, 2014 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
SYDNEY, AUSTRALIA - JULY 17: Whitney Port arrives at the Magnum Sydney Pleasure Store launch at Westfield Sydney on July 17, 2013 in Sydney, Australia. (Photo by Lisa Maree Williams/Getty Images)
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Port, 32, also took to her blog to share photos of her firstborn.
"I love him and feel protective over him, but more than anything, I'm just like obsessed," wrote Port. "I can't stop looking at him, or thinking about him when I am in another room."
The reality star turned fashion designer announced her pregnancy via Insta in February.
Let's hope Sonny will have a play date with Liam James Tell, the son of Lauren Conrad and William Tell, sometime soon.
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More celebrity babies born in 2017:
Celebrity Baby Births of 2017
Celebrity Baby Births of 2017
Following one of the most buzzed-about pregnancies in years, George and Amal Clooney became first-time parents when they welcomed twins -- Ella and Alexander -- on June 6, 2017.
Molly Sims gave birth to little Grey Douglas in January 2017.
Hoda Kotb adopted her first child, a baby girl named Haley Joy. She was born on Valentine's Day 2017.
Model Irina Shayk and hunky Bradley Cooper had their first child in April 2017 -- and with those genes, she's sure to be a knockout!
Jimmy Kimmel's wife, Molly, gave birth to their second child on April 21 -- and just hours after his delivery, he was slated for open heart surgery. Kimmel opened up about the terrifying events, getting emotional on-air as he detailed his newborn's difficult journey. Thankfully, little Billy is now on track to a full recovery.
Ciara and husband Russell Wilson welcomed baby Sienna Princess on April 28 after months of public anticipation! Ciara documented the pregnancy heavily via social media up until the big day.
At 50 years old, Janet Jackson welcomed her very first child, a boy named Eissa Al Mana. She and her husband, Qatari business magnate Wissam Al Mana, split not long after.
He largely stays out of the spotlight, but reports confirmed that Jesse Eisenberg and girlfriend Anna Strout welcomed their first child in early 2017.
Benedict Cumberbatch and his wife, Sophie Hunter, grew their family by one with the birth of son Hal Auden on March 3. His big brother is Christopher, born in 2015.
Natalie Portman and her husband, choreographer Benjamin Millepied, had their second child on Feb. 22. Her name is Amalia Millipied.
Zooey Deschanel and her husband, Jacob Pechenik, had their second child in spring 2017, her rep confirmed. Little Charlie's older sister is Elsie, who was born in 2015.
Tori Spelling and Dean McDermott increased their already-full household with their fifty child, born on March 2. Little Beau is the perfect addition to "our big, beautiful and healthy family," Tori told People.
Gal Gadot gave birth to a Wonder Woman of her own in March 2017! She and her husband, Yaron Versano, were already parents to daughter Alma, born in 2011.
Backstreet Boys star AJ McLean and his wife Rochelle Deanna Karidis had the perfect name for a sure-to-be musically inclined baby: Their daughter, Lyric, was born in March.
Chad Michael Murray and Sarah Roemer excitedly announced the birth of their second child, a girl, in March 2017. Their first son was born in 2015.
"Grey's Anatomy" star Camilla Luddington and her boyfriend Matthew Alan announced the birth of their baby girl, Hayden, in spring 2017.
Pharrell Williams and Helen Lasichanh welcomed triplets (!!!) in January 2017. The little trio have an 8-year-old brother, Rocket. (By the way, this is the couple just a few months after Helen gave birth!)
Armie Hammer's wife, Elizabeth Chambers, gave birth to their second child in January 2017. The baby boy, Ford Douglas, has a big sister in 2-year-old Harper Grace.