I heard that you are planning to take justice into your hand. Don't attempt it, it's so dangerous. She married your father a decade ago but she could not give him any child. Your father died yesterday while eating and you claimed she killed her husband. Let me ask you, if she is your mother, would you accuse her of killing your father? Our old women are facing a lot. How would you lose your mind like that? Nothing confirms your claim and you have almost killed her.
Her tears awoke my consciousness. Just like many others who love your father, we are sad but you have added another sadness to her lost. No happiness anymore. Not even after you have forgotten the pain of your diseased. The wound will always be fresh on her heart. Listen, don't ever dare beat your step mom. It's a curse. You are beating your mother. It's sad and the saddest is that there is no grey around to command you to stop. You either make it legal or leave her in peace.