Yes, just in a different position!

"Indeed, you have done sterling work for me and deserve your reward. Climb off of me and get on your hands and knees, face down ass up!"

Melissa eagerly carried out her master/lover's instructions, positioning herself just as she was asked to. Wiggling her voluptuous ass at the Professor, Melissa teased him until he could stand it no more. Kneeling behind Melissa, the Professor lined his stiff, throbbing cock back up with her tight hole and pushed back in, making them both groan.

Melissa moaned loudly as the Professor reached down and grabbed her tits, using them to pull himself deeper into her then he'd ever been before. As he had hold of her tits, he started playing with her nipples, knowing that it made her feel weak. The Professor grinned as he ploughed hard into his weakened thrall, releasing her left tit so he could reach down and play with her clit.

"Soon, Melissa, can you feel it, my cock is getting ready to fill your womb. S-Something I need to tell you though. Dr Bluder gave me a **** that not only made my balls five times bigger than normal, they're also super potent and packed with swimmers!"

Melissa whimpered as she thought happy thoughts, finally she was getting what she wanted, she would be a mother to (hopefully) another super-powered generation, if they were girls then they too could be bred by their daddy (once they were of age...). Melissa groaned as she felt the Professor's thrusts start to become erratic, his breathing getting heavier as he drew closer and closer to climax. Melissa pushed him over the edge as she came loudly on his cock, clamping down on his breeding tool as he buried it deep in her pussy, roaring out his release. Melissa came again as she felt his scalding hot semen flood her baby-making chamber.