Oh, I knew them before they asked the girls out. They were in several of my classes before that event, and both were good ‘A’ students. They didn�...�t even know I was involved in any way with the girls other than as their advisor and assigned mentor. There was some casual dating and a lot of teasing, and then, unexpectedly, I found them having sex with Ash and Chris in my living room after a dinner and movie date. Marcia and I had watched, and then even joined in.I had kicked myself a bit for. I felt like calling the hole thing off but finally realized I had no option.Next day morning I recd a courier by hand delivery at my ladies hostel. It was a big parcel with instruction to open it confedential. I went to my room and opened it. Inside first was a letter from the bank sanctioning my loan, and then wrapped in another package inside was something that brought color to my cheeks.Sumant had sent a paid of see through red bra and panties some who guessing my sizes accurately and there. He then tied both my hands to the corners of the bed with our dressing gown belts and told me to spread my legs wide and keep them there. I then heard him take off his t-shirt and drop his jeans to the floor. My sense of hearing was definitely heightened and I was longing to feel him touch me. I was not to be disappointed, he began tracing his fingers up and down the insides of my legs. My pussy tightened as he reached my inner thigh but he just brushed his hands lightly over my knickers before. It’s Saturday and tonight baby will sleepover again. Dad told us what naughty girls we were, and tonight he would ‘demonstrate ’ what ‘could’ happen by hooking up with creepy perverted strangers. We said: “ Oooo, were all scared daddy”, and giggled. He smiled and left the kitchen. He came back with a white hockey mask on. He just stood there all creepy looking. He gave us chills. He then held up some twine, like to tie us up with. We jumped up and tried to run out of the room, He grabbed both.