Stephen Woods was the son of the man who had tamed the TG flu. You might think this would be cause for celebration. It was not. His father Jonah Woods was a cruel man, and he wasn't going to share his discoveries with the world unless it benefited him. Certainly, Stephen assumed that becoming rich and powerful was enticing to the his father, but his father thought that if he could further modify the virus, he might become even more powerful than the wealthiest man on earth. To do that though, his father needed test subjects.
This was why Stephen's life was hell. He was his father's favorite test subject. The very first thing Jonah had done to him was to infect him with a strain of the virus that would become quickly become active if he did not receive daily injections from his father. This meant that Jonah was totally in his father's power, for if he rebelled at all it wouldn't take long until he'd turned into a girl, and then he'd be totally powerless. No one would even listen to his story. His only hope was that he could somehow redeem himself in his father's eyes, that he could finally convince his father that he was worthy of manhood, worthy to be his heir, and then his father would remove the virus.
And so Stephen endured being (temporarily) turned into different females every day as his father tested various reversible strains of the virus on him, and obeyed his father's every whim, lest he be punished with more time as a girl.
"Hold still, boy." commanded his father as he aimed the syringe at his naked son's ass. He of course had to strip so that his father could document the change.
Stephen sometimes couldn't help but flinch away from his doom. Sometimes he even dared to dream of grabbing the syringe and injecting his father, but of course his father would turn back and he eventually would not.