Courtenay Semel, the 28-year-old daughter of former Yahoo CEO Terry Semel, first came to our attention after parlaying the bit of fame she acquired from appearing on short-lived E! series Filthy Rich: Cattle Drive into a brief, possibly Sapphic relationship with Lindsay Lohan. Lohan has since moved onto a full-fledged lesbian relationship with Samantha Ronson (or at least she's not denying that it's a full-fledged lesbian relationship), and Semel is now following suit: according to the New York Post, she's now dating Johnson & Johnson heiress Casey Johnson. "They are so happy and completely in love," a source tells the paper.