looking for erotica

Looking for a specific cd/sissy erotica in which the guy has a new girlfriend. She doesn’t know about his thoughts – he posts on an encounters site for a hookup. Meets with the guy, and the guy forces him to bring his girlfriend along next time. She finds it incredibly hot for the cd to get used by the guys massive cock. I believe the story said the guy he had an encounter with had an issue which made sex normally difficult because his cock was that large.