Tyler is very good at schooling his expression; reading things always has a bit of a delay in registering, even now, so it's easy to look impassive.

I am so good at disinvesting, don't worry. I had to disinvest in my fucking boyfriend for a few years so I'd stop feeling bad about killing him.

Instead he'd started resenting him. He's thinking about that, rather than focusing on maybe not spilling that shit, when he hits send.