When I was 14, my parents left town on a business trip. My 17-year old sister invited a bunch of friends over to go swimming in our pool. When they thought I was gone, they decided to go skinny-dipping. But I wasn't gone. I snuck outside and hid in the bushes. I watched them take off their clothes and go swimming. My sister's friends were soooo hott and I got a boner. Then I heard, "What the hell are you going?" There were 3 girls wearing bras and panties glaring at me. They dragged me over to where my sister and he other friends were. They pullled off all my clothes except for my briefs. Then they threw me in the pool. WHen I got out, they pulled off my undies and tied me to a tree. WHile I was tied up, they took pictures of me naked, threw water balloons and shaving cream balloons at me. Then they put some girl's underwear on me and took picutres of me like that! Finally, they left me out there naked until about 10 PM, when they finally untied me.