Matt and Caroline are surprised by the sudden reappearance of Matt's mother, Kelly (recurring guest star MELINDA CLARKE – The O.C., CSI: Crime Scene Investigation). Stefan and Elena are worried about Damon's new attitude, and Damon is asked by Sheriff Forbes (recurring guest star MARGUERITE MACINTYRE) to take part in a fundraising bachelor auction. Alaric discovers shocking secrets from his own past. With help from Jenna and Stefan, Elena is determined to find out everything she can about her birth mother, but the truth may be more than she can handle.