I'd Rather Abandon Them Than Be Abandoned

i found myself embodied in an otome game. the problem is that i am not the heroine, nyla, but the villain, claudia. naturally, claudia’s social reputation is at rock bottom. my brother himself despises me, and my fiancé treats me like a stalker. in this case, i will be unjustly executed by guillotine for crimes i did not commit. so, in a desperate move, i propose a contractual marriage to the cursed prince to get his help, but he takes his role as my husband too seriously! additionally, the original heroine, nyla, who i thought was good, seems suspicious. why are you trying so hard to portray me as an evil character? was claudia really as bad as everyone thought?