The 37-year-old singer, who is topless in the shot, has her hands clasped over her breasts while smiling down at her bump.
“The snuggle is real,” she captioned the adorable family snap.
Pink announced she was expecting her second child with her husband Carey Hart in November 2016.
She shared a photo of herself cradling both her five-year-old daughter Willow and her baby bump, and she captioned the shot: “Surprise!”
The couple, who married in January 2006, have since revealed they don’t plan on finding out the sex of their second child, but Hart would prefer a boy.
“We got one princess, so hopefully we’ll have a little guy coming,” Hart told PEOPLE magazine.
“I don’t want any competition for my daughter. I’m nervous for what it’s going to be.”