Sherlock beamed at the praise. He was Sir's good boy. He was doing well.. It spurred him on even more. He could feel Sir stroking himself, and he found that he wanted it all over him.

"S-s-ir... if... I'm g-g-good.. c-can.. I.. have your s-s-eed?" He asked while he was still pounding into him. It had take all of his concentration just to be able to speak those words. He could already feel his bollocks start to tighten up. He knew it would only be a few more moments before he couldn't hold back.

They did have one more plug, it was a lot smaller, so it wouldn't hold in the seed as well, but it should be good enough to let it stay in there until it hopefully caught. At least they both hoped so.