Something was obviously on Willow's mind. He could see it in the way she fiddled and tore at her napkin, and how she wouldn't look him in the eyes like she usually did. She was usually such an honest and open person that it was painfully obvious when she was either lying or at least avoiding a subject that she either didn't want to talk about or wasn't able to talk about.
It did seem that she was a little out of the loop as well, when it came to Angel. Buffy always was one to hide things about him. She hid him for months back in Sunnydale before Xander accidentally stumbled upon him. Who knows how long she would have hidden his reappearance if someone hadn't of seen him first. She would probably always have a soft spot for the vampire, even if, more often than not, it hindered her to do so. Then again, you just can't control love.
Giles just blinked for a moment when Willow started to spill forth what seemed to have been on her mind for a while. "Willow, putting a soul back into a vampire is very hard to actually do. It was an amazing feat that you were able to do it not only once, but twice. I highly doubt that your magic has gone all 'wonky haywire.'"
Willow's magic, while powerful, had always been something a little wild about hers. He remembered the story of how she once killed the power of her entire block one summer. Of course, she had progressed so much since then, but things did tend to backfire on her more than a more trained witch or warlock. She certainly had much more raw ability than actual training, to say the least.
"You certainly are good past your magical abilities, Willow," he pointed out to her. "Whether or not you can perform magic right now," and he would be looking into that, "you are still an important person to have around right now."