Taboo: a brothers secret obsession. Sister finds her brother's diary and lays down to read it. To her surprise he has been obsessed with her for a long time. She is shocked at the naughty things he writes about her. He walks in and she gets sprung reading it. She at first gets angry then turned on. She starts to lift her dress up and tells him she is turned on by the diary. She goes on to tell him to fuck her and make his fantasy come true. He eventually works up the courage and fucks his own sister. She wants to read more dirty things while he fucks her and realises he remembers their play time years ago. She gets more turned on! She wants his dick so deep and can't get enough! He wrote about impregnating her so she begs for it.