It was all a lost cause. Severus hen pecked tiny kisses against the underside of Sirius' jaw as his abdomen clentched. Bad. This was bad. It was too soon, or was it? The roughly half dozen times that Severus had experimented with himself (he found the thing distastefully distracting and messy) had taken much longer than this.

"Wait--"

No good. Sirius seemed to be unable to comprehend such things.

"I'm gonna--"

Too late. Severus whined against Sirius's shoulder, stained his robes, and made an utter mess of his hand.