Making your sis horny each time she looks at you

You smile getting the perfect idea
"I wish my sister, had always had a secret crush with me"
Then you get another idea and smile "I wish she gets horny each time she can see me or each time she thinks about you"
A muffled moan can be heard from the room near yours and you can't avoid a big smile. it seems it really works...
You look at the clock and leave the room
You go to her door and start opening it "Come on sis hurry up..."