If I was charged of felony because I accidentally cut boyfriends finger and her mother tell lies to the policy, what should I do about all her lies?

My first offense battery with a deadly weapon got me on a level 5 felony. I and my boyfriend were playing around just got up. Well it all went down and I was swing a knife around but not mean to cut his finger. His mother came rushing over due to noise and call police. Stating to them I stab him. My boyfriend said he did it. I admitted to it but they arrested me then talk to his mother alone. She made all kinds lies up that I push her, threated her and such more. She wasn't even there.