What is happening?

What is happening? I do ask this question because i still don't know why she said that. I've been living with her for 4 years and in my mind she seems to be my sister. But recently i have received wrong something which made me gloomy. I did overlooked most of her practical jokes with me, but she always twists tale. Tell me why? I behave all members equal for eternity and seriously consider their issues. But until now i never take delivery of any their care. What can i do???