Maybe it was the rush of adrenaline (or whatever) from having just tag-teamed a feral crocman that was bigger than both of you. Maybe it was the sharp kickback of the rifle Andrea had fired to kill him rippling across her lizardwoman body. Maybe it was the proximity the two of you were in when you went to check on her. Maybe it was just the biological desires your transformed bodies have finally winning out. Whatever it was, when Andrea's maw let out a very lusty moan you turned back to her but it wasn't until you smelled it strong that you realize that both your and Andrea's lizard bodies were leaking like crazy. You realized that your claws were gripping her shoulders, pinning her against the wall and keeping her way too close for your human minds sake, but it was like something in your arms was overriding your brain's command to let her go. No, it was bringing you two closer instead, her even-more-swollen-breasts heaving closer to your body, your twin dicks pulsing and throbbing so hard now you swore they were gonna explode and they're getting closer and closer to her needy and ready-
No! You stop yourself with a jolt and a grunt, your maw gritting shut. You can't do this! You're not mindless animals. What if you lose what's left of your humanity? What if her human side is screaming the same thing? You manage to stop the progress, the tips of your spears not two inches from her sheath, all dripping with that accursed seed.
You hear Andrea growl something with two sounds. Twice. You look back at her lizardy eyes. The lust of the lizardwoman was still there, but alongside that mixed within them...something else. Something...human? You swore you saw those beautiful blue eyes she had as a human for a moment though you can't be sure. Andrea growls those same two sounds, and you realize she was trying to say two syllables...
"Katie". Your name. When even amongst the research team you were, at best, Researcher Katherine Richards, Andrea called you Katie. It was part of what got you to fall in love with her.
Your eyes watch as Andrea's claws slowly made their way down to your throbbing dicks, her touch causing them to pulsate and leak again as she began pushing them gently downwards towards her cloaca, though you can tell from looking at her forearms' muscles and feeling the stuttering force on your dicks that she's actively resisting going full-speed as well. She stops when they get close, her eyes looking up at you as she lets out a staggered growl, half questioning and half lusty. Andrea was showing you that was she was going to go along with it if you would too. The consideration that she showed you when you were both human before all this went down...she was still there.
...Hopefully the other research stations got your data.
A moment passes. Your tail then slowly, deliberately, pushes the metal box containing the last intact antidote to what you assumed would be a safe distance before it quickly wraps around Andrea's legs and you move in, hips thrusting your right dick into her cloaca as both of you let out a long-suppressed roar.
What happens next is rather a blur, your human mind barely able to register your actions and hers as you let your horny lizard sides loose. You remember at some point falling onto the floor and rolling around, fondling her lizard breasts and squirting some of her milk into your mouth, her returning the favor with your two members, poking and digging each other with your tails since that was something you could never do as a human, the finale where you built up and let loose a grand climax as your dicks sprayed both inside and outside her while she sprays you with her lizard milk. As you two came down from your highs, your mind clears back up as you disengaged yourself from her. You let out a soft hiss of a sigh -- you didn't literally have your human mind blown out, at least. Andrea looks the same, her giving a humanlike thumbs-up sign with a contented groan despite her obvious exhaustion being her human side's way of saying both "I'm still here" and "That felt good". You let out a pleased growl and give a thumbs-up back.
But now that your worst fears didn't come to pass, it's back to the current situation. Which is in a torn-up research lab that may still be crawling with feral lizardpeople and/or the military.