A doll and a dollhouse. What the hell am I doing?

I'm at your house, watching your little sister play with some dolls I gave her for her last birthday. I never imagined myself in this scene, it's really interesting and stressful how you have me in the palm of your hand.

"You're really big!!" Your sister says looking at me with admiring eyes. I smirk.

"Yeah, I'm really big.." I answer your sister but without taking my eyes off yours. You know very well that my words contain other meanings.