Nick’s half-brother Reuben Cannon revealed the newlyweds have a “real and honest love” and want to start a family.
He said: “Nick definitely wants kids with Mariah. But I am not sure exactly if now is the time - both of their careers are crazy right now.
“They have a real and honest love. That is what is going to keep them together. He loves her more than any other girl.”
Reuben – who is working on his new solo album – also revealed Nick, 27, was a huge fan of 38-year-old Mariah’s music when he was growing up.
Mariah and Nick made their second public appearance as a married couple at Ellen DeGeneres’ 50th birthday party in California over the weekend.
Other guests at the event – which had a carnival theme, complete with a carousel and stilt-walkers – included lovers Paris Hilton and Benji Madden, Courtney Cox Arquette and her husband David Arquette and Tom Hanks and wife Rita Wilson.
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