The source added: "Right before they left, Nicole gave Melanie two kisses on the cheek."
Mel filed a lawsuit against the comic actor on Wednesday (01.08.07).
Although a DNA test proved Eddie is Angel's father, he is yet to publicly acknowledge the fact.
Mel's lawyer Gloria Allred said: "He has not paid one penny of child support and we plan to ask the court to award child support and to decide what is reasonable.
"We have filed a paternity suit against Eddie Murphy to legally establish that he is the father of their daughter."
Eddie, who is engaged to film producer Tracey Edmonds, is yet to comment on the paternity lawsuit.