My little sister is the youngest in the family and also the most spoiled. She can do almost anything she wants because my parents don’t scold her much, even when she deserves it. She knows she can get away with almost anything, which is why she loves teasing her older brother. However, my brother knows how to put a stop to her tricks—he just tells her that she’s not actually our sister, but an abandoned baby left on our doorstep by her real parents. That trick never fails.

My little sister is the youngest of the family, but also the most-spoiled of the house. She is allowed to do almost whatever she wants, because my parents don't tell her off when she deserves it. She already knows that she can get away anytime, that's why she loves hassling her older brother. However my brother knows how to stop her tricks, he just tells her that she is not actually our sister but that she was an abandoned baby who was dumped at the front of our door by her real parents... that trick never fails.

My little sister is the youngest of the family, but also the most spoilt in our house. She can do almost whatever she wants, because my parents don't chew her out severely /reprimand her/ tell her off even when she deserves. She already knows that she can get away with anything anytime, that's why she loves hassling her older brother. However my brother knows how to stop her tricks, he just tells her that she is not actually our sister but she was an abandoned baby who was dumped at the front of our door by her real parents... that trick never fails. Well done. Nicely written. A couple of careless typos and a bad mistake using ‘his’ when she is a girl, but you also wrote some nice sentences with ambitious vocabulary. Keep it up. Simon