Ha, ha, there are a number of people in the Facebook comments section that are assuming that the baby is Maria's and offering their "congratulations". Or they're flat out asking if Maria just gave birth. Maria definitely has a lot of casual fans that don't pay much attention to her life or tennis.
I wouldn't worry too much about the maternal pull turning Maria into Mama Kim. She has to land herself a REAL man first and she has yet to do that in her life.