My sister came to stay at my place while I was living alone. She wore extremely thin and unguarded sleepwear, making me nervous. On top of that, she suggested we sleep together, so as her brother, I absolutely couldn't lay a hand on her. I said, 'If we keep being alone together like this, our sibling relationship will change, so we can't be alone together.' My sister then replied, 'So we just won't have sex,' and started grinding against me! But of course, her wet pussy made it impossible for me to resist inserting myself. I was forced into three consecutive non-stop insertions, and eventually, I lost my sanity and kept embracing my sister...
