What habit has the woman recently had?

M: Hi, Susan, where were you at lunch time? I was saving a seat for you in the cafeteria.
W: Oh, sorry to miss you. But my search for knowledge was greater than my pains of hunger.
M: I never had that problem. So where were you?
W: My political science class ran overtime.
M: That’s been happening quite a bit lately, hasn’t it?
W: I guess so. Actually, what happens is that a group of students hung around for a while after class to talk with our professor and ask questions.
M: Who is this twenty-first century Socrates?
W: Professor Have. Have you heard of him?
M: Mm, he does have a good reputation in the Political Science Department.
W: And well deserved one. The student who falls asleep in discussion group in seminars fights for front row seat in his lectures.
M: Oh, no, I hope this isn’t catching.
W: You call joke. But it’s great to have a professor who is not only interesting but prepares to give up time for students.
M: Maybe I should sit in on his class some time. Do you think he’ll care?
W: Not at all. Lots of students bring their friends. He says he is pleased with them.
M: Well, just to be safe. 1 think I’ll bring my lunch along as well.
W: I’ll make a good student of you yet.