I pulled the zipper down on the back of her dress and let it fall to the floor. Her bra came next and her large 36D breasts flopped out, nipples alrea...dy hard. I hooked my thumbs into her panties and rolled them down.I was only the second man in her life. She felt she needed a man to climb out of the hole she'd dug for herself. At first, she was very aggressive but I could see it was false bravado. She was so tight, I couldn't penetrate her. She cried and I spent most of that first liaison. It alsohappens in fish. Anyhow here is the story.I was in a lab working on the computer systems doing maintenance of thesoftware and the hard wars of one of the units. There was a new assistantworking in the lab carrying samples they were doing DNA work on frogs tosee if the ability to change gender could be used to change organs like aportion of the liver into a kidney. I was disconnecting the unit and I wason my knees in front of this desk when the assistant walked by stumblingover my feet.. I am unsure whether to help – do ponies usually acquiesce in their own penetration? I decide that this one does, and before Jenny can rip into me properly, take the slippery length, press it against myself and push back.It slips in fast and I gasp. I prefer to lube myself and use relaxants, usually poppers, because however much I want it – and I always want it – there is always some tension that can get in the way. The strange dynamic between Liv and Jenny isn’t helping, and for the first time. Unfortunately it wasnt to be and while we continued chatting time flew by and my parents arrived home just before midnight. Midnight arrived and happy new year it was and rather soon after wishing everyone, we all dissapeared to our bedrooms. After closing our door, Mike asked me, can you imagine what your sister and Carry are about to do. Although it was my sister, I could definitely in my mind picture her and Carry taking turns to eat each others pussies getting myself extremely horny. Mike.