Prinsloo posted a picture to Instagram to commemorate the occasion, showing off her super-cute outfit -- a loose-fitting long black sweater, Adidas shoes and a black cap.
"After three weeks of breastfeeding every three hours, no sleep and nursing my nipples back to life lol, I left the house to see my girls for dinner. Life is so beautiful, can't believe how lucky I got," she captioned the snap.
The Victoria's Secret model also recently posted a sweet Instagram shoutout to another new mom, Candice Swanepoel, who gave birth to her son, Anacã, on Oct. 5.
"Cheers bru we did it," she wrote, captioning a throwback photo of the two models toasting in the days before their babies. "Can’t believe we got so lucky to be on this amazing journey together forever. Love you and can't wait to meet Anacã."
Prinsloo and her husband seem to have taken well to parenthood -- constant breastfeeding notwithstanding -- with Levine recently telling Ryan Seacrest that parenting "is something we're put on this earth to do."