When I got home, my sister was dressed in a strange outfit with a pen in her pussy? I was surprised, but she explained that it was a training that would tighten her lower body, but the appearance was just lewd! I couldn't hold back any longer, so I inserted my penis raw! The training effect made her pussy tight and I ejaculated in no time! My sister seemed to be excited, and instead of getting angry, she inserted it herself in a reverse cowgirl position! I came inside her so much that the sperm overflowed from her pussy with continuous creampies without pulling out!