She definitely wasn't going to let this one go. He frowned, pausing, trying to figure out the best way to approach the situation. How did she know? GLaDOS must have beaten him to her, gloating about what had happened in his imagined Aperture.

Though it was slightly embarrassing, it meant he knew something She didn't--which gave him a bit of an upper hand on Her, as far as that was concerned. If She didn't know he was alive...

But for Wheatley, in this moment, it was neither here nor there.

"Uh, well, Sherlock drowned in the pool. Awkward all around, that one. Then She tried to kill Topher, you know, Topher Brink, sort of--twitchy blonde in the sweater vest, you've seen him. Had a go at me, too, in the event you were at all doubting her continued murderous tendencies."