I always had a secret crush on Katrina's step-brother and she never knew...Then yesterday she let me in on a secret of her own...There is a unique relationship between Katrina and her step-brother...They sometimes fool around when nobody is home....But yesterday she invited me to play along...Who was I to say no??? I thought he was cute and wanted to get close with him...We had a big threesome that did not feel odd at all...Everything seemed natural...I just hope her parents do not catch us or walk in...