This house party

My parents were having a party for our cousins birthday and I did something while he was lying there drunk,

It was a surprise birthday party for my cousin which my parents were having for my cousins birthday he was only 17,
It was in our house and mostly back garden as our garden was massive,
We had gazebos up table and chairs,
Bbq on giving people food and drinks,
I didn't know half of the people here,
I was mostly helping my parents well my mum and aunt,, tidying up constantly,
Wasn't much fun for me,
I was having the occasional drink here and there,
I think my mum actually expected me to help her since I was older well 24
I would have rather been sitting there getting drunk instead, but I wasn't
It was getting later most of the other people were leaving, I'm still tidying up after them,
It was more or less just family and my aunt and my cousin which was rather drunk now he really wasn't making an sense as he was talking now,
Well it was his birthday so I think he enjoyed himself,
My parents and my aunt were sitting downstairs in the kitchen now having a drink and talking,
I'm upstairs walking past my room as I noticed my cousin lying on top of my bed lying there looking rather out of it,
His jeans were down around his ankles and he had one trainer on and one off,
His boxers were down on his thighs
I was actually standing there looking at his cock
It was soft and I was just staring at it
As he was lying there looking like he was asleep I'm saying his name over and over again,
But he was just lying there I was shaking him trying to get him awake so he could go to the spare room,
But he's still lying there,
That's when I basically just pulled his boxers down and I was looking at his balls and cock
It wasn't very big, but he was only 17,
Im sitting down beside him as he's lying there on the bed I'm sitting there next to his waist looking at his balls and cock
Then I was touching his balls I was squeezing them in my hand between my fingers stroking his cock pulled back his foreskin and I was touching around the tip of it
He's lying there mumbling something as I was doing it
I was wanking him off and he was still mumbling something, I'm leaning over and I was giving him a blow job wanking him off into my mouth he's mumbling more and more,
His cock has got hard eventually as I was still giving him a blow job
Then I stopped and I pulled down my knickers as I was wearing a dress I'm on his lap and I was guiding his cock up inside me as I was lowering myself down on his cock
I'm sitting there with it right up inside me I had my hands down on his lap as I was shagging him I was really shagging him he's mumbling much more than before
As I'm shagging him
He's just lying there as I'm sitting on his lap bouncing shagging him
I was actually enjoying myself when I was feeling this warm feeling running down between me as I was doing it and his cock had got soft
I was sitting there getting off him as I was I could feel his cum running out of me and going down around on my legs I'm away to the toilet wiped my putting my knickers back on closed my room door and went back downstairs into the kitchen sitting down talking to them having a drink
I was acting like nothing had happened,,
I had actually just given him my birthday present he would have enjoyed it better if he was awake,,