Premanand Maharaj Ji
How should I behave with a close relative who is jealous and keeps hurting me?
Stay loving with a hostile relative
Keep your own behaviour pure and loving, and let him act from his nature. Respond with a gentle smile; Bhagwan is watching.
From your side the behaviour should be loving, and if he is cutting in his words, let him; it makes no difference, because he is acting from his own nature.