A low growl escapes Alfred at the sight of Herbert, naked, grinding himself up against his leg like that - expressing how much he LIKES this. He felt powerful before, just putting all this on, but now...NOW....

Reaching forward, he catches the older vampire's jaw, pulling him into a deep, passionate kiss. Letting him keep grinding just a bit longer, listening for the sounds he's making.

Waiting for juuuuust the right moment to drop the leg away.