is your sister pestering you?

No my sister does not annoy me on anything. Sometime it is but we solve mutually. We are 3 brothers and one sister and we have good relation just like friends. No one is small or big. We discuss the matter jointly, find the solutions. Though some pestering is essential in such family relationship which we do not mind. But in your case it seems it is all the time. You are annoyed with this. Better you try to persuade her if she bother to much on your personal matter. May be she agree with you. Take help of mom/dad and other elders for this type of problem. If they convince your sister for not to bother on your every matter.