"Mmmm... how is it so good every single time?"
"Thank you big brother. I don't know what I'd do if you ever stopped feeding me your delicious cum."
"You'd never get a girlfriend, would you? I mean, it's not like you need one. I give you everything you need, don't I big brother?"
"You know you can ask me for anything don't you? I'll give it to you. I just want to make my big brother happy."
"You can fuck my ass if you want. God I'd love to feel my brother's cum swimming around inside my asshole!"
"See? You don't need a girlfriend, right?
"Good! Because if you ever made me share this cock with anyone else, I'd kill the bitch.
I really would."