After her sister slept she turned towards me and gave me a tight smooch. I was in another world altogether. I inserted my hand inside her top and kept...on her belly. She took it inside and made me touch her nipples. It was like dream coming true for me. Her nipples were already hard and I badly needed them. I made her lift her top a bit so that I can kiss and suck her nipples. She made moaning sounds so we got up and went into the hall where I made her sit on top of me and remove her bra too.Now. Billy didn't know what to do.Elaine did not know what had happened to her. She was still a virgin. She only masturbated a few times and they were terrible disasters leaving her with the sense that perhaps she was one of those asexual persons with no pleasure from sexual contact.If the lights were on, any fool could see that poor Elaine was in the throes of a full body orgasm. She was convulsing from her pigtails to her flat shoes. She clung to Billy's arm silently pleading for him to stop this. She had taken to sucking my cock, and pulling gently on my balls (which she found fascinating), and although she would not swallow my cum, she would lick my swollen head clean after I’d shot my load.I found that she could achieve several orgasms, whereas I could only manage one or two, and I envied this ability to keep going!We were due to take a trip to visit relatives, and it was going to be a long drive. So we set off for the trip, my sister had grabbed a blanket prior to getting into the. Just relax, it will be fine”She must have read the apprehension on my face.At that moment the bell rang and about 25 teenaged girls in uniform filed into the class and sat down. Debbie, me and Ollie were at the front standing next to the large teacher’s desk which was on a raised platform at the front of the class.After Debbie settled the girls down for the lesson, she introduced me and Ollie as helpers for today’s class into reproduction and sex. At this point, I am feeling very self-conscious.