Puzzle for Fiends

One day Peter Duluth wakes up to find his legs in a cast and his memory gone.There are compensations - the blonde and the brunette. The brunette says he's his kid sister. The blonde, as dazzling and silky as a moonlit California night, says she's his wife. And then there's Minsey, the maternal type. The only problem is that all three keep insisting that's he's Gordon Renton Friend III, drunken heir to a massive fortune.