Yeah, let's not bring up boning Kitty right now or ever actually. He may be in a better place with her but that doesn't mean he still has a long way to go before they can see eye to eye, and knowing he's sharing a partner with her would be way too weird.
He makes a soft noise at the way Jack's hands move over his body. Athletic rather than voluptuous, hips a little wider and waist a little more defined, with breasts small enough to not really need a bra when he's just hanging around a bar. Pressing into the kiss, Spike moves a hand up to start popping buttons, wanting to feel the heat of a living body.