Casey and Donnie in Secret

Turns out Casey Jones was a power-bottom. Who knew?

Mikey was off feeding the chickens, Raphael was looking after Leo, Leo was still healing in his coma, and April was restocking on groceries 2 miles away. Donatello and Casey were in the barn behind the tractor. Casey Jones was stripped bare except for the bandana on his head, facing away as Donnie fucked him in the ass.

Donnie's brothers didn't know that their brother was gay. They all thought he was infatuated with April. Can't a turtle and a girl be best friends without it being a thing? Donnie wasn't sure exactly how they would react if he came out and told them. He was even less sure with Splinter, though their rat-master (wherever he may be) had a habit of figuring things out without saying anything.

Casey was a little more complicated. He always presented himself as the macho-type. It was that way with his friends and his family and the school hockey team. While Casey genuinely did like sports and fighting and hard rock, it didn't stop him from getting funny feelings when he was around his teammates in the locker room. He hit on all the girls, but really it was a habit born out of feeling like everyone was watching. It was hitting on April that introduced him to Donatello, and one thing led to another...

April was the only one who knew that Donnie and Casey were a couple. There was a lot you couldn't hide from a literal psychic. While she didn't act like it, Donnie was certain she knew he and Casey had advanced to the "intimate" stage of their relationship. They've tested her psychic powers and all she ever gotten from her powers with strong hunches. She was safe from getting a front row seat to their ninja-exhibitionism (though for all he knew she would have been into that sort of thing).

If they held a dick-measuring contest, Donnie would have won. It looked an awful lot like a human's penis, albeit bright pink. Casey wasn't sure how he was able to hide that thing. Donnie tried explaining the science behind cloacas and turtle-testies and how it all worked, but Casey was too enraptured by its size to listen.