He's a little...

He looked at Sarah while she gave him the best pair of begging eyes that she had been able to put up as he sighed, there was not a real other option but to give his little sister the thing she wanted when she gave him that look. He took a deep breath before he nodded as he felt her cock throbbing so close to his own rather small cock.
"I... I might be a little... but that does not mean that I haven't you know... wanted to have more... futas that I can do stuff you know as a... duo or... more."
"That's great! I know that I have been thinking! S-so what do you think about us doing some things about that! Y-you know from time to time? I don't want to just jump into things! B-but what about we start small and maybe go up as we learn more about what we like..." Sarah said blushing as her brother froze for a second before he gulped.
"Y-yeah... but what do you want to do?"
"L-let's start off small... we don't need to do anything insane! How about this! Just like what we were!" She pulls off her sweats fully making him flush as suddenly he was looking at her massive pale futa cock! It had to be near eighteen inches long and thick as his wrist, a throbbing pale dick that looked like it was ready to not just make a hole gape but to knock it up as well! He flushed as she moved a bit of her panties out of the way letting the thick throbbing monster shiver in the air as she sighed.
"Ok! That's my cock let me see yours!"
"O-oh ok... if you want..."
"It's ok! I won't be mean! I know you are going to have a smaller dick but that's just because you are a femboy! You are still my bro I won't be a dick."
"If that's what you think..." He slowly removed his bottoms as he blushed showing off his tiny four an a half inches of small dick she looked at it for a moment before a gasp let her lips as well as a short giggle.
"Aww! It's so small! It's cute!"
"It-it's not cute!"
"I think it is! Absolutely adorable!" She said as she suddenly without any warning slammed her massive futa dick down right onto his tiny mocha cock, he let out a squeal as he felt her massive cock smack hard into his own dicklet as her heavy weighty veiny cock hit his own tiny dick suddenly throbbed as he arched his back as cum shot from his dicklet as he felt his body shake as he came from her smacking her cock on his.
"W-why are you doing that!?"
"Aww! You have pre coming out! That's so cute! It's so tiny! It's smaller than my veins and thinner! Aww! I can see why futas want to lock that little thing up! It's just so cute you want to put something around it! You know to keep it safe!"
"T-that's not what a lot of them say when they put on a cage! It's a lot more... intense!"
"Don't worry I'm not going to **** a cage on you! Now."
"Why did you add that?"
"I'm just teasing! Don't worry! Now what can we do besides this..." She said rubbing her massive cock onto his dick she did not catch that he had just cum from the impact and the feeling of that heavy bat like futa cock smashing his small dick was making him feel butterflies as he let out a shrill groan of bliss as he whimpered.