I was surprised at the obvious effort of my stomach muscles in ejaculating as I could clearly see them flexing in the mirror and I was left trembling ...nd weak-kneed and only managing to stand by my grip of the hand-basin.After a few minutes rest I managed to have a shower, pissing thankfully in the cubicle at the same time, and, after drying myself off I was sitting on the edge of my bed as I dressed. My thoughts, as with most teenagers, were about sex and about my inexperience thereof. Up. Then I lean all the way back with my hands on his shins for support while still grinding. I'm just loving being his girl, I stop for a while as I want him to last, as he can. After a break I lift by bottom high while still supported myself on his shins and in dropping down hard I get the most delightful sharp pain as the tip of his cock penetrates my cervix! I yelped! It's been over two years since I conceived Rita and that was the time my unusual ability went away. My god was it ever. ‘Careful Robert,’ Mrs. Bellman had warned me, wagging an aged digit at my face while snatching the first month’s rent from my open palm. ‘Things have been known to happen here…’ punctuating the word happen as if it were some sort of secret that she wasn’t supposed to let on. Taking the money, she said no more, before turning her decrepit frame and leaving me standing in the doorway of the attic apartment. Figuring that her age and the lack of social contact that she probably lived with had. ”“Oh I have to see those magazines so I can learn please.” She continued to play with his cock which was now getting hard again and she started to stroke it like before.“Oh god sis you made it hard again, you sure seem to know how to play with my cock, oh yes stroke it faster and rub and kiss my belly.”She bent and kissed and licked his belly tasting the salty sweat of passion. She let her one hand roam all over his body and then crawled onto his leg. The passion rose in both of them and soon.