ERIC Dane was very attentive to Rebecca Gayheart at DJ AM’s memorial — fueling rumors she’s ex pecting their first child. Dane was repeatedly seen putting a protective hand on Rebecca’s stomach during last week’s service at the Hollywood Palla dium, also attended by Nicole Richie, Lindsay Lohan and Samantha Ronson. Sources say the “Grey’s Anatomy” star and his wife — who made their first pub lic outing since their nude tape was re leased — have been trying for some time to become parents.