You yourself have lost your masculinity just like your brother.
Your look down between your legs at your spade shaped sex. In the past few days you've grown all too familiar with it. The texture of your own walls around your tongue. The taste of your own juices.
You've lost count of how many times you've howled in orgasm, your overly sensitive vaginal walls spasming around the meat of your tongue.
Even now the taste of your own arousal lingers in your mouth coating your tongue.
You would have never done this on you own accord. As much as your mother and brother have both suffered it could be far worse for them.
At least your mother is still in one piece. At least she has not been thrown into a cage full of male cockroaches. At least your brother is still alive.
The evil scientist has relished every chance to force you to humiliate yourself to spare your family of worser things.
You look down at your canine pussy knowing that soon enough it'll be full with a real male's cock. Just as the scientist has promised. For no you have a task to do.