Matthew 14:8 - Ellicott's Commentary On The Whole Bible

Being before instructed of her mother. — Better, being prompted, or instigated. The word does not imply that the girl had been instructed before she danced what to ask for, and St. Mark distinctly states (Mark 6:24) that she went out from the banquet-hall to ask her mother what use she was to make of the tetrarch’s promise. The mother’s absence shows that the supper was one for men only, and that it was among them, flushed as they were with wine, that the daughter had appeared in reckless disregard of all maiden modesty.