My Leggings Tore

I am a teachers aid. I assist in a classroom of 28 children, and the teacher is an early 40s male. I am 21, I love to exercise and stay active so this is a perfect job for me. I love my job but I'm not sure if I'm in a position to return due to complete embarrassment. Since we're nearing the end of winter, I've been wearing leggings and flannels to work, which is both warm and comfortable because I am on the floor and running around with kids all day. This day in particular I was assisting (we'll call him Mr. Teacher) Mr. Teacher with a hands on learning activity on the learning carpet. I had been sliding myself, and my apparently very thin leggings, around the rug helping the class with the activity when I start to feel something rough around my ass. I ignored it and kept doing my job but as I continued to move around. The feeling started creeping forward, closer to my pussy. Again I ignored it, chalking it up to regular rug rub, no big deal. I stood up and walked over to my table on the opposite side of Mr teacher's desk. I was sitting with one leg bent over the opposite knee grading papers when I looked up and Mr teacher was staring at me. I just smiled at him and kept on working. I got up and passed out a few worksheets when one of students remarked "miss A, I can see your butt" and all the kids started laughing. I felt back thete and there was a hole split on the seam right to the front of my leggings. My bubbly ass was on display for everyone to see as i don't wear panties under the leggings because i don't like people seeing the seams. Mr teacher called me over and told me to tie my flannel around my waist. I hesitated to take it off because I was wearing a very tight white low cut tank underneath a an unfershirt, not appropriate for learning, but I did as he asked. Literally my bralette did nothing to hide my nipples under my shirt. I sat at my table for the rest of day, not daring to move much. I was so uncomfortable. My tits were popping out of my shirt, my nipples visable, I probably had my pussy on display for at least an hour, and I mooned my class on accident. When the class was let out for the day, Mr teacher told me to wait until all the kids and principle had left the school to leave. We chatted for a bit in the meantime and I was apologizing but he told me not to worry, he enjoyed the show. Apparently he had noticed when I was grading papers and he saw my pussy but didn't say anything because it had been a while since he saw one that smooth. It turned me on a bit, so I took my flannel off and sat on his desk and opened my legs. He just stared at it so I opened my pussy with my fingers and he got closer to look and sniffed it. He told me it looked so tight and I was getting wet. He told me he wanted just to taste it and I said ok. He hivered his face over my pussy and I could feel his warm breath on me. He gave me a single small lick, then a very deep long lick suck. He moan and looked up at me and said that this was like a dream scenario, my tits in my top, my exposed young pussy, and told me he wanted to fuck me, but that he's married and it would be wrong. I was soaking when he said that and tried to goad him on to take another taste. He said he couldn't. That he has already gone too far. He stood up and got me off his desk and spun me around, he stared at my ass for a bit before asking me to pull the flannel around my waist again and letting me go home. I masturbated as soon as I got home. That was last Friday and I skipped work today and yesterday, I should go back but I'm afraid of the kids mocking and what theve told their parents.