Never sneak into your dominant older sisters room! I was punished for trespassing and sniffing her used bras and underwear. She later tied me up to a chair with shock collar on me. Then she grabbed all her dirty underwear to stuff it into my mouth, I kept repulsing away but she’d shock me if I didn’t obey. So I submitted, after 8 or more used underwear were stuck in my mouth she went into one of her drawers and go a ball gag. It was buckled tightly onto my head and I can do nothing but mumble gently with all my might. 

It reached nighttime and I’d been left naked, tied, and gagged for 5 hours. Saliva was building in my mouth and it had mixed with the impurities of the underwear. I was humiliated. My sister just got back from running errands and she came straight into her room and looked at me helplessly trying to escape. She laughed in a evil girly way and said “you’ll never escape without my will”. She gave me instructions that I’ll do nothing but please her body. She untied me to bathe her. We headed to the Jacuzzi and she too off all her clothes. Her big tits were firm, her ass was jiggly and was completely sweating. I had to sniff her arm pits, lick the sweat from underneath her tits and rim of her asshole. I refused but after she shocked me three times I gave in.

After that I washed out her hair, lathered and rinsed the soap off her body and kissed each foot 50 times as she was drying off. Her toe nails were polished hot pink and I could smell fungus between her toes. I looked up at her newly washed body in glory and she shocked me to never look up at her again. We went back into her room where she tied me up once more. She was going to put me into a cage before she went to sleep but I was forced to kiss her pussy first. I kissed it long and hard then buckled the ball gag on me and placed me in the cage naked and tied. Before walking to her bed she looked down at me with her body naked and her tits in my face and said “see you again tomorrow”. Then walked slowly into bed with her ass cheeks jiggling twice each step.