The choice is eventually taken away from her.

"I...can't do it. You can't make me," Batgirl says, trying to sound tough.
Jervis laughs.

"If you'd just done what you were told, this would be more pleasant for you.
Since you didn't, well, you'll find out what that tart did to you in about, oh, thirty seconds."

Time seems to slow down as Batgirl freaks out.

What did he do to her?
What could one little tart do?
What evil has his mind dreamed up?!?

As time runs out, Batgirl feels...odd all over.

Her arms itch.
Her stomach itches.
Her legs itch.
Hell, even her neck and scalp start to itch.

It is beginning to get really painful.

"What- ooh- did you- yeep- do to me??!?"
"That tart creates a very specific allergic reaction in people. It was designed for Superheroines like you."
"Allergy? You- ooh- mean that I'm..."
"Allergic to all of that latex in your outfit, yes.
If you want this to stop, you know what to do.

Son of a...

The itching is getting worse.
All of her Training to focus and block out things is failing her.

Picture when you have an itch in the middle of your back that you just can't quite scratch.
Now imagine that all over your body.
You're itching now just reading this, aren't you?