Yes.he is right

Hello I and my sister never known our biological father , we Grow up as Muslim's Because Mother was Married to a Muslim Man who took care of us, when my mother passed away she left us a will , she wanted our step-father to have 30K from whatever left in her Saving account .Now he told us that he has the right to take the 30K Plus his share from the Remaining amount , he refereed me to your website as a trusted Muslim scholar ,do you think that our Step-father telling us the truth thank you