Jessica Simpsonis basking in the glow of her new-mom achievements!

The singer, actress and businesswoman couldn’t resist showing off the fruits of her pumping labor on Instagram Tuesday,sharing a photoof a full 5 oz. bottle of breast milk for her 2-week-old daughterBirdie Mae.

“This is what success feels like,” wrote Simpson, 38, adding a cow emoji.

The star welcomed her third child with husbandEric Johnsonon March 19. She joins the couple’s sonAce Knute, 5½, and daughterMaxwell “Maxi” Drew, 7 next month.

Jessica Simpson instagram; Inset: Kevin Mazur/Getty

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Brian Ach/Getty

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Simpson couldn’t be more excited about the new addition to her family. And now, with the pregnancy behind her, the mother of three is keeping positive as sheheals from her cesarean section.

Jessica Simpson and Eric Johnson with their kids, Maxwell and Ace.

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Despite woes from severe acid refluxand extreme foot swellingto sciatica andseveral bouts with bronchitisduring her pregnancy, Simpson still remained active in her older kids’ lives while awaiting Birdie’s arrival.

“Jessica loves being a mom and having a big family,” said another source. “Evenwhile struggling during her pregnancy, she volunteered at her kids’ school. Her life is very focused on her family and making it fun for the kids.”

source: people.com