The 27-year-old singer recently wed Reed, 23, who is most famous for playing Rosalie Hale in the Twilight movies.
Asked if they are planning to start a family, McDonald said to E! Online: 'We're not doing that anytime soon. We're both young. She's only 23 so she's got a whole lot to do.
'We're working a bunch right now. We want to still be young and spontaneous and have fun. In a couple of years.'
Asked how many kids they want, he added: 'We haven't really talked too much about it but we know we want to have kids eventually.'