Leaving the matrix

Dream Fragment:Me and my half sister are in my bedroom, there are posters all over my wall (sort of like in reality except not the poster I have) she points at some greaser dude on one of the posters and tells me that that is what some brother of one of her female friends looks like. I tell her she can have the poster but I don't tell her that I was thinking I don't even know why I have that poster on my wall, i don't know who the dude is, from some rockabilly band it looks like, so I tear it off the wall and give it to her and she leaves my room and i'm relieved that she left my room.