best sex ever 2

i went down to my partners flat and we was talking outside and then we started kissing each other and then he put his hand down my trousers and he stuck his finger up my pussy and i pushed myself onto his finger so it went in deeper and then he took me round the corner and he fucked me senseless and as soon as we came my sister walked out of the flats so we nearly caught us so we pulled our trousers up and then she came out the bottom door and she said what have you two been upto and we said nothing .