[header] How to deal with a big annoying sister (for teenagers ) [title] Try to resolve the issue with your sister. [step] Even when you and your sister have set strict boundaries, you both will test each other's baseline limits from time to time. When this happens, try your best to resolve the conflict before either of you reaches your breaking point. 
[substeps] Let your sister know what the problem is, using " i statements. " for example, " i feel belittled when you talk to me like a little kid " or " i feel angry when you choose not to respect my clothing.