Roger opened his mouth to Simon's kiss; yeah, this was more what he had been expecting before Simon'd cut out on him, Simon's mouth and Simon's hard body pressed against his -
He tasted of gin, presumably the drink Simon had run off to get, but he could have done without that - Simon's mouth was enough.
He cursed the ties binding his wrists then, impeding him from wrapping himself around Simon - he couldn't even help speed things along, helping Simon with his buttons at all.
Anticipation, indeed! Roger was suddenly quite sure he would regret giving in to Simon's ideas, because Simon was a far more patient man than Roger could ever hope to be.