Mariah Carey and Nick Cannon reunited again for a family dinner with their twins, days after she made headlines with her New Year's Eve performance and a week after he was released from the hospital following a health scare.Cannon, whose divorce from Carey was finalized more than two months ago, posted on his Instagram page a photo of the two with their 5-year-old son Moroccan and daughter Monroe, and an unidentified woman at a restaurant Thursday.