Cosmea failed to underline her JCB Triumph Hurdle credentials with the bookmakers despite maintaining her unbeaten record over timber in the Simply Carpets Juvenile Fillies Only Novices' Hurdle at Huntingdon.
Robert Thornton was working hard aboard the 2/7 favourite at a surprisingly early stage but she was a willing partner.
Leading on the turn for home, Alan King's charge stayed on strongly to beat Kahsabelle by five lengths.
Sky Bet were unimpressed though, pushing the three-year-old out to 16s from 14s for the Triumph. Stan James are unchanged at the same price.