Helping my brother out!

It was a Saturday morning, I heard mum and dad leave to go shopping, mum had shouted something about don't stay too long in bed to me and my brother.
I then heard my brother go for a pee, imagining him standing there, cock in hand, in full flow. I thought about going to watch, but it was too nice in bed, and I knew he'd be in soon. He was.
He got in my bed, and laid down.
"Wiped it clean?"
" Fuck off sis, you like tasting my pee, now get your head down there. "
I smiled as I moved down, his hand was stroking his cock, I held his balls and watched as it got bigger and harder. I loved my brothers cock, and soon was licking it, and his balls. I teased him for a while before taking it right down my throat.
"Fuck sis, you're the best cock sucker.". He said as he pushed on my head and started moving his hips, fucking my mouth. I thought thanks to you, letting me practise on his cock.
My bum was up near his head and I felt him slip some fingers up my cunt.
" Always nice and juicy sis, I need to ask you a favour in a moment. "
He started finger fucking me me as I continued sucking his cock. I was nearly cumming when he grunted, held my head tight, and unleashed his morning load down my throat. I swallowed his lovely warm load.
"My girlfriend wants me to go down on her, I'm not sure what to do down there."
I sat backup , his fingers came out of my cunt.
"You mean you've never made her cum eating her cunt?"
He nodded.
"Can you tell me what she expects me to do?" He was 17 and I was a couple of years younger.

I played back, opened my legs. "Get down there and look at my cunt then. I didn't have much experience either, only what Sue and I had done to each other.
I pulled my count lips apart, and pulled them back, showing him my clit. I was developing a nice bush by now.

" This is my clit, rubbing and sucking on it makes me cum, and putting your tongue inside me, so go on, try it. "
I'll give him his due, he did try, his tongue was right inside my juicy cunt.

"Just suck and lick on my clit, I like a thumb in my cunt and a finger or two up my bum." Well that's what Sue used to do.

He found my clit and was nicely sucking on it. "Bit harder, bite it a bit."
I felt his thumb and his fingers, and he was doing well, so we'll I held his head and ground my cunt on his face. I never warned him, just let my orgasm happen, I was soon coming all over his face. He went to pull away.

"Don't you fucking dare,James, keep sucking my clit and cunt, it's what she wants. My legs were wrapped around his head as my cunt juices flowed.

I finally let him up after cumming on his face.
"Fucking hell sis, is it always like that."

I just smiled as he wiped the back of his hand over his mouth.
"Swallow any of it.?"
" I had to the way you had me trapped, now get on your knees, my cock is so fucking hard. "
I quickly got on my knees, my bum in the air as he pushed his cock in my cunt. He fucked it for a while and then put it up my bum.
We both came together and just collapsed flat onto the bed, his cock still in my ass.
He sat up, straddling my bum, pulled my cheeks apart.
"I love looking at my cock in you bum sis." He started rocking back and forth, I felt his cock getting harder.
We fucked again, another load in my ass, then I told him he'd better practice some more. This time we got in the 69 position, me on top, pushing my cunt over his mouth.. He made me cum again, and I made sure he swallowed some cunt juice.

"Do that and she will love it, and if you want to practice some more, I'm here"