See adorable new photos of Ivanka Trump's newborn son Joseph and her husband, Jared Kushner, and big sister Arabella, 2. Credit: Courtesy of Ivanka Trump

Precious baby boy! Since welcoming her second child, son Joseph Frederick Kushner, with husband Jared Kushner on Oct. 14, proud mom Ivanka Trump has been sharing photos of her beautiful family on Instagram. The 31-year-old businesswoman has been documenting her baby boy's milestones and quality bonding time with his dad and big sister, Arabella.

On Wednesday, Oct. 23, Trump posted a adorable photo of herself cradling baby Joseph and giving him a kiss on the head. "One week old," she captioned the snapshot. "Thanks to all of you for your kind words and best wishes." In the photo, Trump looks glamorous in a black dress and matching hat, while her son wears a white gown that resembles the christening robe Kate Middleton and Prince William's son Prince George wore at his baptism on Oct. 23. (Trump was most likely celebrating Joseph's bris, a tradition Jewish circumcision ceremony that is held when the baby boy is eight days old.)

Earlier in the week, the Celebrity Apprentice mentor shared a photo of 2-year-old daughter Arabella playing doctor at Joseph's first doctor's appointment. She also posted a sweet snapshot of the tiny tot cradling her baby brother while sitting in a chair with the caption: "Arabella is such a proud big sister!"

Dad Kushner, the chairman of Observer Media Group, also earned some praise on Instagram from his wife. Trump took a photo of her husband lying in bed with baby Joseph sleeping on his chest. "Jared hasn't lost his touch with a newborn," she wrote. "I'm so in love with these two boys!"

Three days after her son's birth, Trump tweeted, "Whoever said sleep when the baby sleeps never had a baby and a toddler!" But she seems to be adjusting quickly to being a mom of two. The following day she wrote, "Having a baby is definitely easier the second time around. #Iknowhowtoswaddle."