I Thought She Was Older

On the way to my sisters today i saw this girl who looked like she was in her late teens she had on tight jeans and a low cut top and as she walked towards me she was smiling and adjusting her top her tits we're small but nice and i looked round when she passed me and her ass looked great she looked back to 2 hours later i was heading home when i saw her coming towards me again this time she stops and asked me for the time while messing with her top like she wanted me to look and starts walking with me my cock starts stirring in my boxers i was thinking i would fuck this girl we got to the point where i always take a short cut through the field and she went in for a kiss which took me by surprise and she said if i don't have to rush off she would like to suck my dick my cock had been hard for at least 5 minutes and wasn't going to turn her down we got into the bushes and i couldn't wait i pulled down her low cut top and sucked her tits she had my jeans open and got my cock out started sucking it really good i let her do that for a few minutes then got what i really wanted once she got her tight jeans off she had no knickers on i was quick in getting my cock in her i was holding on to her waist fucking her hard she was loving it im pulling her hair slapping her ass then she's on top saying to me come on i want you to cum give it to me and i did she was riding me as i gave her it all as i had nothing left she leaned down kissed me said thank you and got off she started getting dressed and then tells me she got to get home because her mum will be worried i asked her why and she said oh didn't i tell you im 15 and school finished an hour ago I'm fucked if she decides to tell anyone about what we did.