The gift comes after Pink, 37, gave birth to their second child, son Jameson, this past December. The couple are also parents to daughter Willow, 5.
Pink opened up about her relationship with 41-year-old Hart, saying the key to their happy marriage is taking breaks.
“We take breaks. We've had two breaks," Pink told Ellen DeGeneres last year. "The first one was about a year. And the second one was 11 months. … [We're] due."
The pair split in 2008 and reunited in 2010.