*A clip of tonight’s “20/20” interview of Mariah Carey and Nick Cannon – which shows off their 6-month-old twins Moroccan and Monroe – has folks wondering what’s really going on with their message.

In a preview shown today on “Good Morning America,” Carey, 41, and Cannon, 31, said the pregnancy was difficult. “I don’t think I understood the enormity or the magnitude of what it really does to your body,” said Carey, who admits to fertility treatments. “Like it’s not just, oh you don’t look pretty and you have a bump.”

The couple also gives fans a peek into their spacious caramel-and-white-gingham-wallpapered Manhattan nursery, and Mariah is shown singing to the twins as Walters holds them in each arm.

But then there was this exchange during the interview portion…

Barbara Walters asks Carey if she can trust her husband. The singer took a moment and looked at him before responding, “Sometimes.”

Mariah: “Can I trust you more than sometimes? You tell me?”

Nick: Absolutely.

Mariah: Okay, then I trust him.

Barbara: Are you happy together?

Nick: Absolutely.

Mariah: We are – especially when he’s nice. When he’s nice, he’s the best guy in the world.

Barbara: Are there times when he’s not nice?

Mariah: Ehhh, you know.

Nick: Really?

Mariah: “You know, he’s a man, Barbara. Let’s call it what it is.”

Click here to watch the exchange in its entirety.