Kaidan only had to thrust into him once more, before the feeling of Shepard clinching around him sent him crashing over the edge as well and he came hard since Shepard. A loud groan escaped his lips, and somewhere mixed in the groan was Shepard's first name.
Finally he collapsed on top of Shepard, making sure his weight was distributed so that he wasn't crushing Shepard. "Now that was something" he teased in a purr, before leaning back slightly to grin down at Shepard. "Mmm now should I un-cuff you or not? I kind of like having you at my mercy" he purred.