she was awoken by the sound of the door to the testchamber closing. irritated she looked arround, and there she saw a man, he was getting up out of a pool of some sticky substance the mask on his head was not sitting properly and her cum coverd most of his face. as she got up from the ground herself she became aware of the penis she had almost forgotten about. there it was dangeling between her legs, in adition to some huge balls, but they werent quiet as huge as they had been when they were full. her attention was drawn by the man moving frankly between hammering the door and tying to remove her cum from himself. but it seemed, that her cum was disappearing into the skin of his face, it seemed like his skin softend and his beard fell out, his lips got a little bigger. those lips, she wanted to feel them on her cock, it started to slightly rise again. she slowly moved over to him. while at first he resisted her apporch, shoving her away, but not only did she feel stronger, but the exhaustion of his hammering took its toll and he gave in, as she pressed her cock against his lips, of course it was to big, to fit inside, but that was ok, she only wanted to feed him her cum, to see how his changes progressed. it only took her a minute to cum, and it filled her with joy, as she saw how his cheeks filled up, untill he had to swallow. she had done it, she was exited to watch hid changes, so she removed his hazmat suit. he was indded changing, his frame slimmed down, while his hips grew a lot. as his penis slowly recedet into his crotch, followd by his balls she saw why his hips had became that wide, not only did a vagina apear on him, but a big one, propably a good fit for her cock. but the changes, didn't stop there his nipples grew and behind them breasts to feed future ofspring. as his verry feminine form took shape, and his bodyhair vanished, she decidet, that male pronouns werre not fitting anymore, because what sat there was a woman, her mate. with her excitement satisfyed she drifted of into a postcoital slumber.