What should I do about this situation?

So like, My little sister is asleep in my bed right now and I'm sitting at my desk, because we were watching a Movie together and she fell asleep. So like a few minutes ago, my cat jumped on the bed and she woke up and was like 'Duhbull shadoo'. So, automatically, I was like 'xD Wtf?'. And I said.. 'What?' 'Dun-bull-SHA-Doo.' Then I just started laughing hysterically. 'WHAT?' ' I said DUHNBULLSHADOO'. So I just keep laughing and she's all 'It's not funny!'. So I laugh more of course. Then, I'm like 'You're speaking gibberish.' So she goes. 'Stop laughing at me.' 'Then get out of my room.' Then she says 'I wasn't talking to you?' Guys. What if my sister can communicate with the dead and there is actually a ghost in my house? Wouldn't that be scary? But yeah, How should I get her out of my freakin' bed. D: i r tiredz n i need my sleep. (Like my n00b speak?).