The Lady or the Tiger is a story about a king who punishes people by giving them two doors. One with a tiger that will certainly kill them. The other with some sort of nice thing, such as a lover. In the story the lover of the princess is forced to make the terrible pick. One door with a tiger, the other with a lover. The princess has the chance to tell him which door to pick, but she doesn’t want him with a new girl. Which does she pick? The story doesn’t say but the princess likely chose to tell the prince which door does have the tiger.
She hates the fact that the future lover is someone she hates. “and the princess hated her. Often had she seen, or imagined that she had seen, this fair creature throwing glances of admiration upon the person of her lover, and sometimes she thought these glances were perceived, and even returned.” This means that the woman is basically stealing him from her, and she definitely doesn’t want that. Also the fact that she is doing that in the first place likely means she is not the greatest of people. The princess also likely doesn’t want the prince to be with that person, so she might do it “for his own good”.
Some may say that watching her lover get slaughtered is bad, but she has definitely seen it before. According to the story this is how the king punishes every criminal, and also is very likely to being her along. “But how much oftener had she seen him at the other door! How in her grievous reveries had she gnashed her teeth, and torn her hair, when she saw his start of rapturous delight as he opened the door of the lady!” She thinks about the lady stealing his man more than him dying, meaning she prefers him getting killed.
In conclusion, she would much rather see him die. This is because she hates the woman he will be with if he doesn’t. She also thinks about him getting to marry the woman much more, meaning she thinks this ending is worse. She would rather see her lover die than marrying someone she despises.