He lifts back up as he his hand gets into place. It's more comfortable for his arms to stand up again.

And as long as Natasha will let him roam, he'll take advantage. The shudder through her body elicits a sly grin from him, and a little pride he can get a reaction from her.

While his finger presses, possibly too gently, and he regains his balances back on both feet, Bucky's mouth greedily envelopes one pert nipple. His other hand trails down her back, pulling her as close as possible, legs and all.