Jack probably shouldn't get his hopes up — Spike knows how to make coffee, he's done it for Ianto on the rare occasion at the Shack and before that he'd brew a pot for Rose from time to time, but he doesn't touch the stuff himself. It'll be decent, but probably nowhere near the high standards Jack is used to.
"Don't think it'd hurt to keep an eye on him-" Spike starts while he fiddles with the coffee maker. "-but I don't think he's in any position to hurt anyone. Not yet, anyway."
Turning, he gives Jack a look. What happened to Tyki was eerily similar what happened to Spike, so of course there's sympathy. They were close, once. May even be close still, even if things have changed drastically.
"You lot did a right number on him. You know that, right?"