Yup, and the reason is the male would be much smaller than the females. Ha, I so saw that coming. Well not the TG itself, I thought maybe he'd just be a midget drider. And now we know they were both in on it and Heather was the only one in the dark.
So, next time I guess we get to see whether or not they'd already known her secret or if they were going to transform her unwillingly.
Also, I kinda hope they do something about his face. He still has a dude face, he needs a cute face to match those new boobs.