As you know I serve many masters and some have other slaves. The other day after a session I was still tied up when one of them came in. Apparently she felt threatened by me so to make her point clear she started tickling me brutally. I thrashed and struggled to get away but it was impossible while laughing my head off. I struggled so much the chair nearly fell over but she didn't care she tickled me harder and harder til she left for fear of being discovered.