"Oh, this is what we're doing?" That's rhetorical; Michael accepts Orpheus's hand and pulls himself up behind him, though he does look slightly doubtful about riding the deer.

If he's honest, the fact that Orpheus might have helped Hades with his marriage makes everything that much worse. It gets a little complicated when you venture into the territory of owing people things, outside of the basic respect and consideration he believes everyone's entitled to. But at the same time - someone helps you, you ought to be grateful. You ought to help them back, not sabotage their marriage in return, right? Maybe he wasn't owed a reward just for getting here, no matter how impressive it was, but that's just basic reciprocity.

And that trick about not looking back? That's just petty and mean. It's exactly the sort of thing Michael probably would've done, once upon a time.

"Well, I guess that's good," is all he says. The doubt in his voice is pretty clear, though.