Allison Cox, 33, was charged on December 17 with three counts of administering poison with intent to annoy.
She is accused of adding car screen wash to meals given to Jacqueline Gold while she was working for the underwear tycoon as a nanny.
The allegations reportedly came to light after Gold, who is worth about £180 million, noticed that food prepared by her chef had a strange taste.
Cox, from East Grinstead in West Sussex appeared at Redhill Magistrates’ Court in Surrey yesterday and was granted unconditional bail to appear at Guildford Crown Court on January 20.
Ann Summers has more than 130 stores in Britain, Ireland, and the Channel Islands and one in Spain, according to Gold’s website.