I, with my insatiable lust, was captivated by her defenseless ass and wanted to fuck her without even looking at her face. So I immediately inserted myself and pistoned away, using her vagina as a mere hole for sexual release. As I thought 'Ahh, that felt good,' the hole I thought belonged to her turned out to be her sister! This is bad! It should have been a fatal situation, but she said, 'Keep it a secret from my sister and do more...'
