Apparently, we got the info from Den's review of "I've Never Done That Before 14" He's usually accurate, and she may not have done that before, so ...

... just checked out her scene via AEBN, and at 7 minutes in Tice pumps his frist stroke into her ass then goes Ass to Pussy a buncha times. The pussy has the same labial piercings, but we don't get a complete body shot (face/anal) shot until about 14 minutes in, when we're as close to a RAC as we're gonna see, and the pussy still has the same piercings and the head is Cytherea's, not a stunt pussy's.

So, I would say Cytherea did anal at least once.