Should I just make my ex pick up his ring his own self. He trying to blackmail me?

I broke up with him last week & he's trying to blackmail me if I don't get him his ring back saturday. He wants me to mail it to him. He's like " I will show your parents every sexual text message you sent me". Our texts are extemely kinky. And my parents are without a doubt going to freak out. They super strict His mother gave him this ring for his 16th birthday.( he is now 24) She said to give the ring to someone special.& he chose to give it to me as my 20th birthday gift.. He's never even been to my house before.. But he says he knows where I live and will come over if he doesn't have his ring Saturday. I could get him in major trouble because he's fooling around with a 16 yr old. But I haven't . I know he doesn't have a car but how on earth can he come to my house and expose me to my patents but he can't even pick up his own ring ?