The mother of two shared a video of the occasion, where she unabashedly strikes a series of poses before Packer, 48, plants a sweet kiss on her cheek. "#festive moments at #aurora #capri," Carey captioned the video.
She also posted a photo of one of her diva poses with Packer, and labeled the image, "#moments."
The 46-year-old singer donned a cleavage-baring, black lingerie dress for the dinner party, while her billionaire man kept it super casual in Nike track pants and a gray jacket.
Carey has yet to reveal her wedding date but she did spill some details on her nuptials when she chatted with ET in April. "I tried my dress last night," she shared backstage at one of her shows on the Sweet Sweet Fantasy Tour. "It looks good. They came and brought it. ...I can't say the people. I can't say their names. The fabulous designer house that's amazing."