How to get revenge on a chick who is obsessed with your boyfriend?

[kat]

So my boyfriend cheated on me a long time ago with this chick, but now he has given up talking to her and it has been months since anything has happened between them but she won't leave him alone. She still sends him nudes on his phone, email, facebook and always asks him really sexual things and he always just replies with "i'm not interested" or just ignores them. What can I do to get rid of her? but first make her feel terrible for almost ruining a relationship and not leaving us alone.