Kiss Of Death: Soul-Sucking Temptress

"Please make me yours... that is all I asked." I whimpered over to him seductively, little does he know that it's the last thing he will ever hear. Meghan Hastings lived her whole life wallowing in pain. Suffering from chronic heart disease, she felt like there was no point in doing anything because she's already accepted that she'll no longer live longer than 18. Until one day, a demon living inside a pendant grew a physical form from all the hatred in her heart. Her desire to survive and destroy those who wronged her, awakened the demon to give her what she had desired but with a price of a soul. The demon had given her the power to take the life of a person, in exchange of their soul. If she kisses a person, she'll be able to get their appearance, talents, skills, weakness in the price of killing them. What if the person she loved was the one she kissed?