Mariah the Scientist accepted and the couple sealed the moment with a kiss after Young Thug proposed to her on stage during his Hometown Hero benefit concert in Atlanta, following their four-year relationship and a brief October split.Videos show Young Thug down on one knee as a giant screen flashed "Will You Marry Me?", Mariah displayed a large diamond ring and she had said days earlier on Power 105.1 that she wanted to settle down and eventually have a child.