(Edited)
M: "I don't think ppm coming in so early."
Me: "Anything. Who's ppm?"
M: "Ppm?"
Me: "Yea you said that you don't think ppm will be coming in so early. So I asked you who's the mysterious ppm."
M: "Oh sry it's a typo. I wanted to type ppl."
Me: "Ppm is the new shortform for people. HAHA!"
And I thought she's having a rendezvous with a mysterious ppm. LOL!