A bit more info about Mary Ann's parents...
Thomas seems to have a been a keen gardener and is named as a winner or runner-up in various local competitions. He worked as a commercial traveller for Mr. James North, of Kings Mill. He died in May 1855, aged 51, and was buried at St. Paul in Huddersfield on 30 May.
His wife, Mary, sank into a depression over his death and she took her own life on the afternoon of 18 July 1855, hanging herself from a stairwell banister. A verdict of "temporary insanity" was recorded at the inquest held the following evening.
Mary Ann is listed in the 1861 Census living in Leeds as a lodger at the house of police constable George Ramsden, 33 Templar Street, Leeds. Her occupation is given as "milliner".
As far as I can tell, Mary Ann never used her clairvoyant skills again after 1855.