Even with that dick driving forcefully into his mouth, Steve managed to drag the flat of his tongue along his length, greedily accepting the attention. Steve wasn't sure if he was good at this, necessarily. But clearly his boyfriend wasn't begging him to stop, so he must have been on the right track. The blonde was happy to be on the receiving end. He'd take and take, no matter how hard Bucky thrusted, until those hips stilled and cum filled his throat.
Steve swallowed every bit of it, going so far as to lick Bucky's softening cock clean, careful not to tickle him. Then and only then would he budge, crawling up next to Bucky and resting beside him. He leaned to kiss him. Kissed his mouth, kissed his cheek, then leaned back, his expression caught between contented and curious.
Bucky didn't appear to be bothered by anything that had just happened. And Steve was only slightly bothered.. He remembered everything leading up to the past ten minutes. Tony, the kitchen, the questionable breakfast.. Steve just also realized that he hadn't entirely been in control of his actions. Or rather, he had done little to keep himself under control. And that was the part that weighed on him..
That, and he had been so wildly driven by lust, he hadn't taken his foot off the gas long enough to really appreciate what had just transpired between them. He reached out, combing his fingers through Bucky's messy hair. "We should, ah, do that again sometime.." Steve smiled, adding, "..we should have done that a long time ago.." A long time ago, from Steve's perspective. That smile turned wary. "..still not mad?"