Set them apart and talk them through right's and wrong's. Well, it depends how old they are. Explain to them why hitting is wrong. Trust me grew up with ALOT of siblings.
make them kiss and hug then they are to embarassed to fight so they normally stop fighting
answer:
don't embarass them, and don't shout at them. trust me i know because i have a sister and we...
Explain to him why you dont like him hitting you, and ask him nicely to stop. If he persists, approach a parent and ask for them to help you with the situation.Buy a gun?
Unfortunately there isn't an easy answer to this; there isn't much you can do.
Be with her, act assertive around the other guys, and try and make it obvious that you are together. If someone does...