The couple are believed to be expecting their first child and though the rapper-and-presenter refuses to be drawn on the speculation, he revealed he and the singer have been thinking about possible names since they first met. Nick - who married Mariah in April 2008 - said: "We`ve been naming our kids since the day we met. I can`t give you that though, you`re trying to get me in trouble with my wife!" The 30-year-old star also believes the `Hero` hitmaker will be a better parent than him. He added to America`s OK! magazine: "She`s going to be amazing. I will be a good dad too, but she`s such a nurturing spirit, she`ll be good." Nick also revealed if he was having a baby he knows exactly how he would decorate the nursery. He said: "Lots of colours, yeah, I`m pretty sure there`d be some rainbows on the wall." Mariah, 40, further fuelled pregnancy rumours when she failed to show up for Nick`s birthday bash in Los Angeles on Saturday (09.10.10). She did attend his first party in New York on Friday (08.10.10) wearing a bulky coat and refused the offer of champagne.