Quote from Sam in Yacht of Fools
Evan Drake: I'm afraid I didn't have much in common with my brother. Sam: Oh, you, too? Same with my brother. Evan Drake: Julie, you told me you didn't have another brother. Julie: Well... Sam: Uh, well she doesn't, actually, but I do. Rebecca: Well, well, it's not actually his brother. They're just such close friends that Sam likes to think of him as his brother. Sam: We just don't have anything in common, that's all.