What does the woman mean?

M: I was shocked when I heard you had finished your research project a whole month earlier.
W: How I managed to do it? It’s still a mystery to me.

W: My mother got really annoyed with my father yesterday evening.
M: Why? Did she complain about his cooking?
W: Oh no. It was about watching television.
M: Don’t tell me he fell asleep in front of the television.
W: No, he kept changing channels on the remote.