Is it good habit to say all what happen in home to there friends is right or wrong?

 My younger sister was saying all thing happens in home to there friends is right or wrong.

Saying is good but unknown person take advantage of it she believes or she want to given tips to overcome from this situation she say all the things.

Yesterday she just keep the rice then she even did anything I said don't add me in that food.

Many issues with my body but she said he is lying to my mother it is good.