You reluctantly agree. Looking down you see your brother's dicklet between your legs, You can't help but laugh. Jacon's manly dick lays limp between his meaty thighs. Jacob smirked at the pathetic boyhood he had stolen from his brother. His 4" cock would make an elementary school kid jealous. Howerver, it shows up your pathetic 2 to 3 incher. That brought a smirk to your face, Jacob's cock was bigger than yours and currently you had his manly member. Older brother was finally more of a man than the Younger brother.
You watch, your eyes fixed on what had been your new bigger cock, It began to stiffen while you though about how pathetic you were previously. All of your, Jacob's, manhood, was sticking straight our at you, hard as a rock. You give yourself a few strokes and your new dick is close to cumming. You stop to keep your load inside you. You shudder with anticipation, your brother breathing deep, and trying not to cum.
You hold your breath, all of your attention focusing on what's between your legs. Jacob's dick is rock hard and fully extended at a little over 4". You look in mirror at it, recognizing that now you're the beta brother. Jacob is the alpha,you feel naturally subserviant to him. This feels right and makes your dick so hard.
Your younger brother seems to be loving this new change of circumstances. "Whoa" he grunts, his eyes taking you in before looking at his enhanced manhood. Withough taking his eyes off of what use to be your dick he says, "Suck it." You want to resist, but you can't. You find yourself, on your knees inching forward, towards what use to be your dick. Within seconds your mouth is open and pleasuring what use to be your penis. Jacob moans in pleasure as you work every inch of your former dick. Moaning and tensing, as you work his body.
Jacob moans again, more manlier, his (your) 4.5" rock hard cock on the edge of orasm. All of a sudden he stops your head from working his stiff new pole. He looks deep in your eyes, you avert your gaze. He's the alpha, you know it, you don't deserve to meet his alpha gaze. You're surprised at this realization. Just a little bit more dick and all of a sudden you're a beta bitch.