Deadly Nightshade by Sem Thornwood

Isabella Vasile:
My mother called me Belladonna. The poisonous plant with sweet cherries as fruit. She wanted me to become just that for every man who lay eyes on me. Sweet on their tongue but deadly. She said it is the only way a woman can be powerful in our world. But I never wanted that. I never wanted to be toxic. I wanted to love and be loved. I wanted to be sweet without being deadly. I didn’t want to hurt anyone.
Only I did… I did become a sweet-looking deadly thing to reach what I have always wanted. True love.

Alessio Mazzoni:
She had the darkest eyes I have ever seen. So dark they were almost black, just like the poisonous cherries she once warned me about. When I was a little boy I promised her that one day I will marry her.
I never forgot that promise.
Even though how unworthy I am, I will have her at the end. One way or another.