BENONI: Charlize Theron and Sean Penn are talking marriage, despite only dating for a matter of months. The couple has fallen hard and fast for each other and is apparently keen to make their romance official. “Sean is head over heels in love with Charlize and her son Jackson. He is a totally different person around Charlize, she brings out the gentle and fun side that not many people have seen of Sean,” a source said. “To see this previously surly grown man, romping around Charlize’s backyard with Jackson, with a smile on his face would amaze Sean’s detractors.–SS