On Sunday, Charlotte's sister, English DJ Samantha Ronson, also shared a photo of her hanging with the new addition to the family. In the pic, a hoodie-wearing Samantha cradles the newborn in her arms as she smiled for the camera.
"Happy Birthday to you @nateruess! On your birthday I just want to say.... Thank you for the best gift ever..... my cafe du monde sweatshirt! Oh and my nephew is pretty awesome, too," she joked in the caption. "What a generous guy you are.... #happybirthdaynateruess."