Both parents work, and my reliable younger sister handles all the housework. However, she cleans in an extremely defenseless outfit with a low neckline, so not only does she flash her cleavage and panties, but her cute nipples are also visible. Even though I know she's my sister, I can't help but look. Eventually, I got an erection and was caught by my sister. 'Shit...' I thought, but then came an unexpected development! My sister seemed to get excited by my erect penis, and even though we knew it was wrong, we ended up having incestuous sex.
