Was Lafay even allowed to teach in the condition she was in?

As Renesmee entered the Potions classroom she couldn't help but feel sorry for the poor Professor. She didn't look very well and it was highly likely she didn't feel well either. If Nessie had the guts she would have given Lafay a hug, but she sort of remembered Lafay not being one for hugs anyways.

Instead she just gave the Professor a nod. "Hello, Professor. I hope you're getting better." Maybe that wasn't the brightest thing to say, because she clearly Lafay didn't look much better, but then being positive was good no? Ness thought it was.

After talking to the Professor Nessie headed towards an empty seat and pouted as she read the board.

Truth Serums.

Interesting.