Me and My sister

I've obviously never told anyone about this story but I guess this is probably the right place to start so here's to all you perverts lol

About 10 years ago I would have been 17 and my sister 3 years younger used to have to stay at our Nan's house in Summer but the house wasn't big enough for the entire family so we had to sleep in a tent in the garden so one night I was feeling horny, this was fairly obvious as I had a massive hard on. My sister wanted to see it so I proceeded to remove it from my boxers she exclaimed "WOW that's what a cock looks like" I said "Do you wanna touch it" She said "Yeah" she started stroking it, I said "If you've touched mine can I touch yours" She blushed and said "Yeah I guess so" I pulled down her panties which I could see were a little damp already, I started rubbing my thumb on her clit massaging it until she quivered slightly, Then I said "Want me to lick it" She replied in between breaths "Yeah" So I parted her lips with my fingers then started lapping at her clit until I felt her hand on the back of my head pushing it deeper into her pussy until I felt some juices run out of her, Then I said "I've made you cum wanna see me cum?" She said "No I wanna taste your cum" So she took my rock hard cock in her mouth, and considering she was a virgin she certainly knew how to suck a cock, I came so hard it hit the back of her throat making her choke