As soon as i realised what i was hearing, all the blood in my body rushed into my cock. I was overcome with adrenaline, heart pounding. It was 8am on a sunday morning, the sun shining through the gap in my curtains.

I closed my eyes and began to stroke my shaft. sounds of the female body crept into my room from next door, the gentle moans, gasps - my cock was the hardest it has ever been.

Next door my older sister was riding her dildo - her thick ass pounding up and down, stretching her puffy pussy open, slime oozing out, clenching at her large bouncing breasts.

I imagined her body as i stroked my cock in euphoria - what was she thinking about? does she want me to hear? she began to moan as she reached the egde of her orgasm - i was about to find out my big sister soaks herself when she cums

As she climaxed i could hear every sounds - the air rushing from her lips, the liquid spraying all over her floor - fuck

not a second later i sprayed hot cum all over my stomach and bed sheets

Fast foward 6 years - both happily married, getting on with our own lives. Myself, discovering the memory of those sounds: I was obsessed with stroking my cock to those memories

Over time, the desire to tell my sister - for me to lay bay my sexual excitement at the fantasy of us, together, able to fuck each other in a way only a brother and sister can

to explore the taboo, to live in a thrill - for her to feel how i feel - jesus christ, these thoughts filled my mind and brought me to the most explosive and euphoric climaxes

I imagine her body. I imagine her pussy

I find porn that enables the imagination to run wild and fixate on the idea of my sister being the woman on screen and myself being the thick cock shes riding

I leave this story (actual fact - this is a memoir) with a question, for sisters who could/do enjoy the idea of a primal sexual encounter with their brother:

Should i confess this to my sister with the security of her understanding and possibly desiring this, also?