She kept asking what the surprise was but I wouldn’t tell. I gently kissed her on her lips, and we kept going on at this for several minutes until f...nally I pulled away and said “are you ready for your surprise?” she jumped up and said “yes…. What is it…. Tell me. “ I said “you will know soon enough, now close your eyes.” She closed her eyes and I unzipped my blue jeans and exposed my cock. I said “give me your hand.” She quickly gave me her hand and I formed it to mine. I placed her hand on my. I could taste the lube, but nothing could bother or stop me at this point. I rose to my feet and lifted her to hers. I kissed her again and then whispered, “You been hiding things from me, you naughty girl.” I smiled at her and then lifted her into my arms. I carried her into the bedroom and laid her on the edge of the bed. I again dropped to my knees in front of her and continued to give her wet box a work over with my hungry mouth. I stopped for a second to tell her to hand me her toy. She. I guess if a strong wind blew, I would've gotten hard since I hadn't had regular orgasms lately, and it felt good. The hand reached into my underwear flap and pulled my cock out. The hand was soft and smooth caressing my dick, so I kept up trying to act asleep to see what would happen next. Sure enough after a few minutes the weight on the bed shifted, and I felt a warm wet mouth engulf my cock. Holy shit! It felt great! I rightly assumed it was my s*********r, but sucking me in my sleep was. I can assure you that I've never overlooked any cheating. You know how difficult it'd be for a one-to-one student to cheat anyway. And, if there is any issue, I'm willing to stop invigilating. You know I don't really need the money and do it more for occupation than anything else."(Perhaps I should interject here, that students who need extra help for any reason negotiate a 'learning contract', which specifies what they are entitled to – it might be extra time, or a large-print exam paper, time.