Billy shivered when he felt Frank get tight like that. He had to stop moving, and when he was sure Frank had nothing left to give, he let go of his cock and sort of slumped on top of him.

"Holy shit," he breathed, panting against Frank's shoulder. "Fuck, man."

That was all he could manage just then, though. He stayed like that for a moment before he pushed himself up, just enough to pull out and collapse next to Frank. He grinned at him and brushed the back of his fingers over Frank's arm.