Charmed sorceress Holly Marie Combs reveals in the next issue of TV Guide magazine (on sale Monday) that she is expecting her first child with longtime boyfriend David Donoho in April. And, like magic, her character, Piper, is going to discover during February sweeps that she's pregnant, too. But since the good witch has no steady, who's the daddy? "Who says there is a father?" teases executive producer Brad Kern. (Well, you got me there.)