2x18 - The Saddle Club

The Saddle Club befriend a young painter who turns out to be Kristi's long lost big sister, Chelsea. Melanie is upset by Lisa and doesn't want to be her sister any more. Veronica is jealous because she doesn't want to share Kristi with Chelsea. Meanwhile, Kristi and Veronica have the opinion that Chelsea is out to get everyone because she wants to know their star signs and their birthdays.