Glad that the professor didn't hold any grudges. Mari really deserved prison, what she did was not cool.
I mean, I thought that at first too but it's not as if she actually killed them, she jut had to plug them back up and they were just fine. If anything, sending Mari to prison and just leaving the Prof and shuri laying there was pretty terrible idea and could have potentially ended with them dying for real.
Obviously, harming people out of jealousy is a horrible thing to do, but the way it was presented made it seem even worse than it actually was.