This is the one shot @assdassdassdassdassd very specifically requested-.

Boris's Perspective

I looked over at my small bunny brother and sniffed the air. "Bro it smells like there are some good veggies over there, imma go get 'em. You go look for other veggies." I said and he nodded. He hopped off quickly and I followed the scent of the tasty veggies. Soon I found a carrot that was deep in the ground, with a small bit of greenery sticking out. I started burrowing and yelped when I fell down in the hole I had just dug. It was deeper than I had originally thought, so I couldn't hop out if I tried. I flattened my ears and cried out for help.

Many hours later, Mugman's Perspective

I looked around and heard the plea for help once again. I sniffed the air and followed the scent of fresh and live rabbit. I lowered my head and carefully crept along the ground as I got closer to my prey. I came across a bunny deep in a hole and looked down. "Give me one good reason why I shouldn't eat you right now." I said with drool sliding down my lip, showing I was hungry for him. He flattened his ears more and looked up at me with pitiful eyes. "I-I know for a fact that all the female foxes in the forest are d-dead-." He stuttered out and I growled. "So-?" I said with bared teeth. "I-I'll have your b-babies instead-." He said desperately and I laughed. "Okay, sounds good." I said jokingly and rolled my eyes. "If you do that, I promise not to eat you." I said and hung my tail down so he could use it to hop off of.

He jumped out and I gently nuzzled his cheek affectionately. He whimpered and looked at me nervously. I licked his cheek and led him back to mine and cup's large den area we had made for ourselves. I curled up in my nest and he sat in the middle of my curl, tiny compared to me. I put my tail over him to keep him warm and he snuggled up to me happily. "Thanks for not eating me." He whispered and I kissed his small black nose. "No problem..." I whispered and rested my head on top of his. He nuzzled me and I smiled softly. "Good bun bun." I said and he giggled. He nuzzled me some more before settling down and sleeping. "G'night..." I said and kissed his fluffy forehead. His tiny fluffy tail wagged quickly in his sleep and I chuckled. So cute.

I looked up at Cup who had come back in with a small rabbit in his jaws. He was holding it like a baby cat, and to be honest it was acting like a baby cat. Flailing and whining for dear life. I giggled and Cup slowly set down the bunny. "W-Where's Boris?!" The bunny yelled and I moved my tail to show the bunny I had been snuggling with. "Him?" I asked and the short bunny raced over. He sighed in relief and Cup curled up in his nest. I watched as the tiny bunny curled up on the ground, cold and stubborn. I rolled my eyes and nudged Cup. He growled in response and continued to ignore the bunny. I sighed and went to sleep with Boris in my snuggly grip.

Many months later, in late fall

I woke up to feel a familiar bunny happily nuzzling me in his sleep. I smiled and got up, getting ready to go feed him. I looked back at his black and white fur and gently kissed his black puffy forehead. I trotted off the get a carrot for him and some meat for myself. I ran in to the forest and saw that Cup was already out, getting a few shrubs for his bunny friend. I hunted for food and came back many minutes later to see Boris and Bendy snuggling together. I smiled and placed my carrot down, immediately catching my cute bunny's attention. He hopped over and gnawed on the carrot, happy to see it. "Thanks Muggy..." He said and I kissed his forehead. "No problem." I said and started eating the squirrel I had brought with. I pawed at his tail as he ate and he giggled.

I sniffed the air and drooled when I realized it was mating season. I growled quietly and dropped the squirrel head on the floor. I looked at Cup who had just returned and he growled back at me like 'bro don't even think about it'. I huffed and curled up in my den with a new throbbing erection.

Bendy's Perspective

I noticed both Cup and Mugs were fidgety and panting, so I nudged Boris and whispered to him. "I think they're in heat." I whispered to him and he stared at me. "I-I didn't realize-." He whispered back and I giggled. "Watch this." I said and hopped over to Cup. I gently nuzzled him and he kept growling. I eyed his erection and poked it with my nose. He immediately tensed up and panted. "Good boy~." I said and he drooled. "Ghhaaa- n-no- b-bad bunny-." He stuttered out and I giggled.

A few months later in late spring

I nestled in to the warm nest Cup had made for me and whined when my swollen belly kept me from settling down. I rolled over and Cup happily licked my belly. "So warrrrm." He said and pressed his face against my belly. I giggled and my tail wagged quickly. I groaned when a sudden pain filled my body and I whined. Cup got off of me quickly and Mugs came over.

A f t e r birth-

I panted and laid down with the tiny bunny-foxes. There was a white and black fox with a bunny tail, an orange bunny with fox ears, an orange bunny, and a black and white fox kit. I smiled and cup curled around me and the new babies. "Go get 'em food silly." I said and he quickly left. A smiled and looked over at Boris who was pushing. Mugs was nervously hovering over him, ignoring the little foxes and rabbits whining. I sighed softly and tilted my fluffy head back. I started to fall asleep and the tiny babies suckled for milk. I gently petted them with my paw and relaxed. I slept peacefully with tiny puffballs wriggling on me. 

I hope I did okay-. It was 1000 words-.