And Pink - who has Willow Sage, 9, and Jameson Moon, 3, with Hart - praised Vanessa for being able to "translate" her husband's comments to her during the therapy sessions.
Speaking in the video, she added: "You need someone to hear both of you and then translate it for you, and without Vanessa translating for me for the last 18 years, I mean we would not be together.
"We just wouldn't because we are not taught as kids how to have relationships, how to get along with people. I mean, what's happening in our country right now is a perfect example of that.
"We don't know how to love each other, we don't know how to get along, we don't know how to communicate."