Sherlock groaned loudly. Over the years, they'd talked about having a beast mount one or the other of them.. or having a bunch of Demons take their turns filling Sherlock's arse with their come. But it had never happened. William came along, and then he became their focus.

Sherlock did think about it once in a while, but he would never bring it up, because there never seemed to be a good time. Of course now with two more babies on the way, it seemed even less likely.

He moved on purpose, which made the dildo shift and sent a shiver of pleasure up his spine. "NNnng."

"I want you to watch while a beast mounts me and takes me and fills me." His voice was a low rumble.