What is this story?

Hello everyone,

I'm new and it's great to be here. This is a bit of a long shot.

I heard someone once mention they read a story, possibly in a periodical magazine publication, about a queen in ancient times who had a rival queen that was also married to her husband, the king (kings had many queens in those days apparently). However, the eldest queen's child was expected to be the next king. Anyway, the first queen mentioned uses astral projection to conduct some under handed nefarious deeds in order to make her child the king instead. I would like to know, what is the name of this story and who wrote it.

Thank you.

It could be the story of Dhruva but there isnt any astral projection involved.