New Vet worker

I had been working at the vet for almost a year. I still considered Bella my bitch as she stayed in my room and I fucked her at least twice a day. Then I would fuck any bitch that we housed too. I haven't had many girlfriends so my experience was limited but there wasn't a feeling better than Bella's pussy and ass.
One morning I was introduced to a new volunteer. His name was Russ. He was older and looked rough and tough. He was wide chested and had arms that were as big as my thighs.
He seemed pleasant. He even passed Bella's test. She allowed him to pet her and scratch her ears.
As I showed him around he seemed to relax a bit. I told him I was going to run to the feed store and asked him to start letting the kennels out. He agreed and I called Bella to ride with me.
He asked why I was taking her. I explained that she was "MY" dog. I emphasized my. He smiled and nodded.
"Ok". I get it. Maybe I will find a bitch for myself". I smiled and called Bella and we left.
Once in the truck Bella was sniffing my crotch. She nuzzled her snout between my legs.
I laughed "ok. Ok Bella, do you need daddy to give you s quickie?"
I pulled the truck to the far side of the fed store parking lot.
I pushed Bella to the passenger side while I pulled my cock from my pants.
I looked all around to make sure no one was near and could see. That would land me in jail and unemployed.
But Bella couldn't wait. She was whiny and humping the air with her tail high. She was wanting her daddy's cock bad. I moved my fingers to fury pussy. Her pussy was fat and squishy. I rolled myself into the passenger side. I was half on my knees and half on the seat.
I grabbed Bella and pulled her pussy onto my hard cock. I kept looking around to make sure we weren't seen. As I thrust deeper each stroke into Bella's now wet, throbbing pussy. She was panting and whiny. I pushed balls deep and felt her body ripple.
I ground balls deep till I felt he rippling stop.
I watched as a truck pulled into the parking lot. The old driver threw his hand up to wave, I did the same. Hoping he wouldn't drive any closer.
I held Bella's hindquarters still so she wouldn't be seen. Because this position is only for one thing.... fucking.
The old driver turned to park closet to the store. I pumped Bella a few more times then I deposited my cum deep in her. I moaned "Bella, fuck girl you're a hot fuck".
Once my cock went soft and slipped out of Bella's wet, swollen pussy she reached back and started cleaning my cock.
I decided I couldn't risk getting caught so I pushed her head away and stepped out. Once outside my truck I pushed my wet sticky cock in my pants. I left Bella licking my cum dripping from her pussy.
Once back in the truck Bella went straight to my cock. She wanted more daddy cock. But I had to get back so I pushed her away.
But being the kind heart that I am I reached over and started fingering Bellas pussy. Her fur was still wet and swollen. I felt my cock twitch as I would love to get again.
I knew I'd give her a good fucking tonight after closing the vet.
Back at the vet I started unloading the feed.
Russ came to assist. We made small talk and had some laughs.
Near closing Bella came up to me and started humping the air while backing her hindquarters against me.
I pushed her away, not wanting Russ to suspect anything. Because let's be honest. Me fucking Bella is illegal in all 50 states.
Russ made a joke about all bitches are good for are fucking. I nervously laughed while I pushed Bella away.
Russ asked if they was anything else before he headed home. I told him no. To have a good night.
The minute I locked the door Bella was sniffing my crotch. I unbuttoned my pants let them fall as Bella started licking my sticky cock and balls. Her pussy juice was still on me from the fuck in the parking lot.
I watched Russ sitting in his truck. I waited thinking he was going to leave any minute. But he didn't.
Bella was whiny and humping the air like crazy.
Then Russ started walking back to the door.
"Fuck!" I snapped as I reached down to pull my pants up. I opened the door trying to keep Bella from giving away our secret.
Russ said he didn't really have a home. That he was homeless at the time. Me being the bleeding heart that I am told him he could stay here at the vet. That there was a room with a single mattress he could crash on.
We chatted and shared a pizza. Ask the while I kept having to push Bella away. She was becoming more and more persistent with wanting her daddy's cock.
Russ noticed bellas behavior and said that he thought she was in heat and a good fucking would chill hey out.
I told him I agreed but we didn't have any make dogs at the kennel tonight.
Russ scratched his chin and said "well you being a good daddy to her she'd probably let you fuck her". All while staring at Bella licking her pussy.
I gave a half chuckle and said "yeah but that's illegal and I'm not wanting a record for dog fucking".
I reached down and rubbed Bella's ears.
The silence could be cut with a knife until Russ whispered "I don't see any cameras my friend". Giving a wink and Smile.
He called Bella. Bella pranced over to Russ. Russ rubbed her ears then moved his hands down her back. Bella started humping the air again. Russ looked up at me and then slid his hand under her tail. He never took his eyes off me.
I felt my cock hardening and a nauseated feeling in my gut. I was both jealous and turned on.
I watched Russ move his fingers around Bella's fat pussy. He didn't push them in but he kept them on her rim.
I laughed and stood up. Bella reacted to me and walked over to me.
I nodded my head and told Russ "goodnight".
I walked into my room and Bella followed. She jumped on the bed and started whiny and humping the air. I walked over to her. I was angry and horny.
I dropped my pants and Bella started licking my cock. She nuzzled her nose under my cock and licked my still sticky balls. "You want daddy to fuck you girl?" I whispered to her.
I spun her around and pushed my fingers into her pussy. Her wet fur was welcoming. I stroked my cock as I pressed against her pussy.
I slid in. Her hot wet folds welcomed my cock.
I started pounding. I felt jealous and I pinned her hindquarters with my arms and I sank balls deep. She was panting more and I was feeling her body ripple as I ground deep in her.
She jerked and stared at the door. I look and see Russ standing there watching me fuck Bella.
Neither of us spoke. He walked over the the bed and it was then I saw his hard on.
His pants were tented as he reached down and rubbed Bella's ears.
His hand slowly moved to her tail. Inches from my cock deep in her pussy.
Still not a word was spoken. His fingers moved under her tail and touched the shaft of my cock.
Then he pushed his fingers into her pussy. His fingers followed my cock inside her hot wet folds.
He let out a moan. He started moving his fingers in and out of her. Rubbing my cock as I am still in her pussy.
He used his free hand to unbutton his pants. His cock sprang free.
His cock was much longer and thicker than mine. He started stroking his cock as he finger-fucked Bella.
He motioned for me to start moving. I did. I moved my hips giving Bella a deep stroke. Russ started stroking his cock faster and his breathing turned to moans.
This made my cock thicker and longer. Bella whined and began to pant again.
Russ pulled his fingers out of her pussy. He offered his fingers covered in pussy juice to Bella. She lapped his fingers feverishly.
Russ asked "you willing to share her?"
I shook my head "no".
"Ok man I can respect that". He said. "I never saw anything, you won't hear anything.... if you get what I mean".
I nodded my head. He stepped back and rubbed Bella's ears once more while my cock was still in her hot throbbing pussy.
He walked out of the room. Once I heard the door close I started pumping. I fucked her hard and deep. It was all about me right now. I was reclaiming what was mine.
I flipped Bella onto her back. I reached and smeared her pussy juice on her asshole. I positioned my cock against her rosebud. Then I pushed balls deep.
I fucked her asshole hard and deep. Bella was panting and whining. I shoved my fingers back into her pussy. I trusted my fingers in her pussy and my cock in her ass.
I knew I was going to cum soon. I had become too emotional.
Remembering Russ touching his dog. His bitch. I shot my cum deep in his asshole. I grunted as I ground my cock balls deep.
I was panting breathlessly I whispered "you're my bitch Bella, mine!" As I fell onto the bed.
Bella turned and stared cleaning my cock. Her rough tongue felt so good on my shaft and head.
I wondered what Russ was doing....