It Was During A Hot Summer Vacation, And I Know It Was Hot In The House, But My Little Sister Took Off Her Clothes And Started Lounging Around Half-Naked Even With Me There! I Tried To Pretend I Didn't See Her, But As I Saw These Young Naked Bodies In My Line Of Sight I Got Excited And My Dick Became Rock Hard! When She Saw That She Said, "You Pervert! How Could You Get Hard Looking At Your Little Sister!" And Started To Tease Me!