It made no sense but the more he thought about it the more it did make sense: their isolated existence, his father’s affection for Millie which seem...d to go beyond just friendship for his wife’s sister. Paul had seen Millie leaving his father’s bedroom in the morning; he’d seen Millie and his father kissing and playing grab-ass when they thought the kids weren’t looking.His father was an affectionate man with both Paul’s mother and his aunt and he and Jessica had speculated that there may be. I had pleased all three sets of couples and I even came in the mouth of one of the ladies so that was kind of hot even though I was gagging on a cum tasting orange ball. I thought my work for the night was over but apparently my work wasn’t finished as Robyn removed my orange ball and sat naked in front of my face where the three ladies had taken turns being eaten out. This I actually liked doing as Robyn’s pussy was so much sweeter and tinier than the other three women. I felt Robyn hold my. I was on a late lunch and had no more classes that day. Some marking for Friday then thankfully the weekend beckoned. The loud door knock dragged me out of my day dreaming, it could be a pupil or an ancillary staff member, no matter I called that they should come in. I recognised the voice immediately when she said "hello Sir might I speak with you", it was Harriet one of our six formers due to finish school the following day. Without a glance I asked her to come in and sit down. When did turn. Her cum was imminent but mine still had some time to develop.I lunged harder and randomly into her.That extra movement tipped her over the edge of the orgasmic cliff - she exploded in a massive orgasm ... flooding my shaft with her sticky juices. I held her tight against me, savouring the moments when she was joined explosively with me.“Oh my god ... oh fuck” she moaned.“Thank you ... thank you”.I held her until her orgasm had waned. I slowly withdrew from her, allowing her to roll onto her.