Someone’s fingers in the tart?

“So, let me get this straight, your husband’s girlfriend...”

“Scabby tart!”

“OK, your husband gave his tartfriend a diamond clitoral ring, probably so nobody but him would see it, or to avoid it ending up on her finger. She would’ve been wearing it on the night they died... exact circumstances unknown, but police treating it as a lover’s tiff turned violent and closing the case. When the tart was found, dead, under Ronan, also dead, there was no sign of the diamond ring?”

“Correct!” said Mary. The shortest speech she’d made.

“And you want the diamond back?”

“Correct!” Equally short.