Desmond and his son

Desmond and his son, Charlie are sitting on their sailboat, and Desmond begins to tell him of a special island he used to live on, a place he hasn't visited for many years. He reveals that the island he is speaking of is in fact Great Britain. He tells Charlie that he is from Scotland, the most beautiful part of Britain, and also where his parents fell in love. Soon after, Penny joins them on deck and tells Charlie that this was the place where his father broke his mother's heart, and Desmond replies that he had left that bit out.

Source: Lostpedia