Tied standing and tickled

Carina is tied up standing. Her legs are fixed at the wall and her arms are tied to her back. Now it is time to try out how we can have some fun with her. And soon it is clear: She is extremely ticklish. Even a little touch at the right place makes her scream and laugh. Gagging her, therefore, seems to be a good idea. And why not blindfold her also, just to be a little mean?... Now it starts to be a real formidable task for Carina to manage her situation. The high heels she wears, make it difficult to keep her balance, while the tickling begins to really exhaust her. She uses every little break to take some deep breaths, but there is no mercy for her...