It was my sixteenth birthday, I had already fully developed and stopped growing so I was 5'7 with full 32C breasts and plump lips. I wore skimpy clothes to show off my slim waist, this particular day I was wearing a brand bi colour salmon/black strap mini dress which showed off a lot of cleavage and a pair of 5 inch heels that accentuated my long legs. I wore my long silky blonde hair down as I walked up the drive to my friend's house. Jodi let me in and immediately covered my eyes with her hands. She was 5'4 wearing 6 inch pumps and denim hot pants and a white tank top, like me she was fully developed and even had larger breasts than me that her top barely contained, she had long glossy auburn hair and a big grin on her face. She led me through to the lounge and revealed the surprise to me. My other friend Carly was waiting also with a huge grin on her face. Carly was 5'8, hourglass figure with average breasts, she wore a blouse and jeans. I was ushered towards the chair and sat down on the chair Carly had been sat on. "Happy Birthday!" They cried out and pulled out some cuffs and a ballgag from their pockets. Before I could really react Jodi had my hands cuffed behind the chair and Carly eased the ball into my mouth and pulled the buckle tight around my head. "We stole some money from my mum's purse and bought these for you, hope they're comfortable!" Jodi teased as she snapped the cuffs tighter while Carly tried to find the end on some duct tape. Eventually she taped around my middle and lower arms, pinning me to the back of the chair and then taped my heels to my feet and fixed my ankles together. They then did a small photo shoot of themselves with me all tied up. I played along. It was a lot of fun.