My sister masturbates with a vibrator every night! I was watching her and secretly inserted a vibrator into her while she was sleeping! I couldn't resist watching her do yoga and inserted my dick, and the vibrations made her feel even better and I came inside her! Then my sister woke up and asked me to keep the vibrator inside her again, and she couldn't stop spasming and cumming over and over again! ? The intense pistoning of my dick and the vibrator raging in her vagina seemed to have destroyed my sister's pleasure center, and she came like crazy!