If you are alone with them, don't react emotionally to anything they say. Like NOTHING. Otherwise they will take advantage of it and say that you talked badly to them when the parent(s) get home
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How To Survive Your Younger Sibling
Random17 tips to surviving life with a little dem- I mean sibling that will probably save you from strict parents and (sometimes unfair) punishments
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If you are alone with them, don't react emotionally to anything they say. Like NOTHING. Otherwise they will take advantage of it and say that you talked badly to them when the parent(s) get home