The echoing thuds of bare feet on linoleum drew your attention to the hallway where around the corner appeared a lizardman. It was a grayish crocodilian type, without any signs of torn clothing or anything that would suggest he was a recently-turned lizardperson -- probably one of the original attackers of the facility. You glanced over at Andrea, who wasn't looking at the newcomer so much as seemingly looking away from you, like she knew her failure to rein in her needs brought this trouble.
That would have to be taken care of later. The giant crocman walked closer to you two with deliberate speed, showing himself to be bigger than you in size. In more ways than one: not only was it apparent that he was taller and more muscular than you, so were his two prominent reptilian members the emergency lighting in the hallway was illuminating. You growl back almost instinctively as it became obvious he wasn't interested in you -- his eyes were on Andrea. (Penis envy with a crocodilian mutant -- not something you'd ever thought you'd find yourself having when you were a human female researcher.)
The crocman stopped about thirty feet away from you, a more puzzled low roar coming out from him as his eyes track the rifle in Andrea's hands. Andrea lets out a growl back, still with that tinge of lust that created this showdown but she had been looking at you when she did that. That seemed to alert the crocman that something was up with you two, as he took a big sniff in your direction before suddenly letting out a loud roar. You're not sure what made him so hostile all of a sudden -- did he figure out you two had held onto your humanity? Was he was just incensed that a lizardwoman turned him down? That a lizardwoman turned him down for someone smaller than him? Or what? -- but you see him suddenly break into a sprint towards Andrea, his dicks already stiffened and throbbing.