My friends sista is highly slutty

I saw my neighbours sis and told him she was cute. 5 mins later he's at my door with his sister. she walks right past me into the living room. all my friend says is she's highly open sexually then left laughing. i went to the living room and she had all her clothes off and let me tape it. we have sex all the time and post are vids and pics. she's nothing off the hook but is open to anything.