I mistakenly had fuck-a-thon with her sister instead of the chick I had come for. Her sister was in warmth and kept on having an ejaculation while I was apologizing.

I mistakenly entered my step sister’s room and had sex with her. She was highly upset but I brought her to the climax. After that she became angry and I realized my mistake. Her sista who entered the room after them laughed at me and my smallish dick.