The wicked Vashti would bring Jewish women, strip them naked and order them to perform work on the Sabbath. Consequently, she was punished by being commanded to appear in the nude at the banquet of Ahasuerus, on a Sabbath day (BT Megillah loc.

Why was Vashti killed?

Gamanit: It is clear that Vashti was put to death on orders of Achashverush that she be executed. She must have been pretty young when she was killed. She married Achasheverus as a child and after she was executed Esther was married to Achashverus herslef for quite a while.

What happened to Queen Vashti in the book of Esther?

Mentioned briefly in the Book of Esther, Vashti was a queen whose claim to fame is that she refused to be paraded in front of a group of men and then faded ignobly from the dramatic narrative. She was replaced in the king's harem by Esther , who takes center stage as the heroine of the tale.