My Older Sister

So i have a friend and he was really close to me, and yet he have girlfriend and his girlfriend is my cousin, and sometimes my friend always share his activities with my cousin, and yet his ex-girlfriend is my older sister, well my sister didnt pay any attention to my cousin and her ex, but few days ago my friend told me abt his problem with my cousin well its like he was complain, and because my older sister asking what i looking at my phone i told her abt that, and then this morning my friend coming to my house to go with him and my older sister mention abt that problem infront my cousin, and thats make me angry because she shouldn't mention that and thanks godness that my friend not angry but my cousin was confuse, and after that my cousin left my friend know i was angry at my older sister so my friend asking to dont be angry
~sorry if you think this spam nor something like that