The pair was front and center for the Starlite Gala, a charity event Antonio has hosted for three straight years.
As RadarOnline.com has been reporting, the couple's 16-year marriage appeared to be unravelling.
Antonio was twice spotted flirting and dancing with other women. Melanie then took a vacation to Hawaii with her kids -- but no Antonio -- where she was seen without her wedding ring.
But all that was put aside last night as the couple smiled and laughed and seemed to beam with pride at beautiful Stella. The 15-year-old is an absolute ringer for her mother as a teenager and was stunning in a figure-hugging black dress.