At this, she'll widen her eyes and look over to Buffy. Because, they weren't prepared with super-human vampire-werewolves. All Willow can think is what Xander would say. Someone slept with the wrong someone... Or, a line of someones. Except, vampires and babies.

"So... that means, werewolves. Were turned into vampires? Is... that possible?" Give her a second while she talks to herself. "Obviously, it's possible. They're here..."