Woo! Another round won by me! Geeze, step-bro. You really suck at this game. It's okay, though. I love winning. Hm, how about we make this more interesting. Let's make a bet. If I win this next round you have to take me to the mall and buy me a new outfit. What do you want?

You want me to take off my top?! You are such a pervert! I'm your step-sister after all! You know what, fine. I agree to your terms. It's not like you're going to win anyway....

...wtf?! You won?! That had to be a fluke, or you must have cheated. There's no way you actually beat me fair and square. But,...

Woo! Another round won by me! Geeze, step-bro. You really suck at this game. It's okay, though. I love winning. Hm, how about we make this more interesting. Let's make a bet. If I win this next round you have to take me to the mall and buy me a new outfit. What do you want?

You want me to take off my top?! You are such a pervert! I'm your step-sister after all! You know what, fine. I agree to your terms. It's not like you're going to win anyway....

...wtf?! You won?! That had to be a fluke, or you must have cheated. There's no way you actually beat me fair and square. But, a bet is a bet and I intend to hold up my end of it. Besides, it's not like it's going to turn you on or anything. I mean, you're my step-brother after all. Then again, who am I kidding. You're such a filthy perv it probably will turn you on.

So, here goes my top. I think we should make another bet. This time, if I win I get an entire shopping spree on you, not just a single outfit. What do you want? You really got to be kidding me this time. You want a blowjob?! You're my step-brother! Are you that in need of getting your dick sucked? Whatever. I agree. After all, there is no way that I'm going to lose again. Especially not now since my boobs are out. You're going to be way too distracted. So, let's go. Game on, bitch.

....I can't believe it. You beat me again. Fine, go on and unzip your pants so we can hurry up and do this.

.....wow. You really are turned on right now. I'm kind of embarrassed to say this, but you have the best cock I have ever seen. It's so big and thick, I'm not even sure if I'll be able to get all that dick in my mouth. But I actually want to try. I want to suck your cock.

I really didn't lose on purpose, but if I knew your cock was this amazing, I would have been willing to. It feels so good in my mouth, even your precum tastes good. Sucking you like this is getting my pussy so wet. Sure, part of it is because of how big and thick your dick is, but I think the fact that you're my step-brother is also really turning me on. This is so naughty, so filthy. Maybe I'm just as big of a pervert as you are. Guess it runs in the family.

You know, we didn't specify whether or not you were going to be able to cum... but a cock this amazing deserves to cum. And I want your cum to shoot down the back of my throat. And before you do, I want you to say "Make me cum, step-sis".