A Queen's Law of Survival is a Manga/Manhwa/Manhua in english language, Comedy series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

She used to be an immortal. She gave up her immortality for eternal love, yet was betrayed by the one she loved. In a twist of fate, she was reborn as a princess in another world. Now, she is faced with the ever-impending danger of being sacrificed by her cold-blooded father to her brother. Can she find a way to rewrite her destiny...?
Note: The title is actually supposed to be “princess” instead of “queen” but I realized too late