How the Villainous Subordinate Survives

After being murdered by my lover, I transmigrated into a BL novel character. And to make matters worse, it's into Rosenthal, the 'villainous submissive' Crown Princess who gets her head chopped off by the Crown Prince, the main dominant, for tormenting the main submissive, a concubine. Just like how I died at the hands of my two-timing boyfriend in Korea, this time I'm destined to be murdered by my husband who's obsessed with his concubine. Damn it, what bad luck. But I can't die like this. I'll survive no matter what. I don't care about destroying the original story. But is the author punishing me? The more I try to escape, the more I feel like I'm sinking deeper into a swamp? Introdu...