I undo my blouse and unclip my front fastening bra, then bendover his meeting table, flipping up my skirt up to expose my rear. Wednesday,no knickers ...ay, for me at least. The day when he is usually very rampant fromthe display downstairs. A morning BJ is not sufficient. I wait about twentyminutes then I hear him entering the outer office. Moments later his officedoor closes, he stands behind me and without finesse rams a bonehard erectionstraight into me. I get the fucking I wanted last night. I've known him for almost 2 years, he's well built as you can imagine, strong arms ripped chest, strong built legs. He'd often flirt with me saying hello sexy, how's my sexy babe doing today etc, making me feel good about myself. Often flirting back with him as well.This particular morning, it was the last week of my 3 month program so while I was busy with my workout, Mark came to watch me, to see if I was doing all the exercise correctly. It was legs and abs day, so I was doing lunges, leg. " And I really should have expected at this point that Kimmy would enter the room. Or to put it another way, I shouldn't have been surprised. When she did. "Hey!" I heard a shout from the door behind me in a tone that suggested surprise, but pleasant surprise. And I realized that this was really happening and I might as well just join in the perversion as fully and deeply as everyone else. "Hi Kimmy." I smiled. "Ever watch your mother get fucked in the ass?" "Yes" She answered I shook my head.. I glance round, and see he’s pulled out his dick. It’s huge, and rock hard.“Sir, no, it’s too big,” I gasp, but he takes no notice. He takes it in his hand, spreads my cheeks, and positions the knob against my slit. I can feel him sliding it up and down, making me even wetter, before with one thrust he pushes his big hard dick right up into my dripping pussy.“I bet Jimmy Porter’s isn’t this big, is it?” he says, as he pistons it in and out with firm, hard strokes. “No Sir, I’ve never had one.