Oh, he did, and mostly did not care. Mostly. Certainly there was a level of self-loathing for acting against a child, but there was also a sort of apathy because really, the kid had asked for it. Robin was a bit old to be learning "don't get involved with assassins, because that never ends well," but the sooner, the better.

Part of him wanted to justify it, too, by saying Omi was worth more than some stupid kid who hadn't outgrown playing dress-up, but that was a slippery slope to start sliding down, especially when one was already leaning dangerously over the precipice. The whole killing-for-hire thing required him already to assign value to this life over that one, and once begun, it was hard to stop. Kids younger than Omi were a new low, to be sure, but really, what other place to go was there, except down?

"Don't mention it."

Probably everyone would be happier that way.