Remind yourself that your child is not jealous, they are grieving, and they are hurting. They are not being deliberately malicious. Their behaviour shows they are struggling and they need your help.
With so many resources giving parents advice to stop sibling fighting, we lose sight of the positive side of these seemingly negative interactions. Parents are often so eager to stop any fighting that they don’t realise that actually, most sibling fights, provide wonderful communication education, personal growth and emotional literacy to both siblings. To aim to stop any sibling squabbles is not only naïve (because no families have siblings that don’t fight, often regularly!), but a lost learning opportunity for the children.