I played Hitman 2016 for hundreds of hours and I just found this out right now. You can make Sean Rose meet up with Penelope Graves at the slurry pit.
This is what they say
Sean Rose: Well, well, Graves. Funny bumping into you here.
Penelope Graves: Rose? What are you…? Did you set this up?
Sean Rose: Let’s call it a test of allegiance. The boss is fond of this whole ‘enemies united’ thing and the chaos it brings with it. Me, I like to keep things in order.
Penelope Graves: So you set up this elaborate ruse to see if I’d rat you out. Of course. Interesting play, Rose. Only one problem.
Sean Rose: Really? What’s that?
Penelope Graves: Well, for two reasons. One, I’m not a rat. I’m here to change things. I believe the boss and this outfit is a way to achieve that goal. And two, we burned all traces of my travels here. Your girl, Hall made sure to remove any digital traces, so we covered all the physical tracks. I mean, there’s no way Interpol would be able to follow me here. I know how they work and quite frankly, losing me cost them their best analyst.
Sean Rose: Well played, Graves. Well played.
Penelope Graves: So we’re done with these games?
Sean Rose: For now, yes. You can return to your work. Go on. Lots to be done.
Penelope Graves: Aye-aye, sir.
Sorry if I made any typos. I’m really starting to love Colorado. As I play this mission more and more, I find the targets and the way they interact with each other so fascinating.