In the midst of a slow change

Sarah began to wake up. She was completely disoriented and every inch of her ached.

Where was she? The cell? No? Somewhere else. She was a prisoner but had been moved from the cell while she was out. Syntessa had attacked her and poisoned her, but she was still alive. What was going on? Oh god, everything hurts.

What was she laying on? It felt like sand? A towel on the beach? Ugh, her eyes hurt so much.

Sarah was trying to sit up, but everything felt wrong, her legs felt weird like she was tied up.

Was she tied up? No, well her hands and arms were free at least. Sarah could barely open her eyes, it felt like they were covered in sand and gunk. As she tried to wipe the crud from her eyes, she kept poking something sharp into her forehead, but whatever it was she wasn't bleeding. Were her hands in a cast or something?

Sarah's eyes were finally open and able to adjust. It looked like she was in a large room far bigger than her cell. The walls were the usual advent black/dark blue. It appeared that the floor was covered with a thick layer of sand. It had to be at least a foot thick, and yes she was laying on a beach towel. So weird. It looked like there were some empty Advent barrels in the corner of the room.

Sarah looked at her hand, and what the fuck. Her ring finger and pinkie fingers were covered in some kind of cast-like resin. Did they break her fingers? Why would they do that? and whats up with her nails, her finger and thumbnails were now pitch black and looked thick.

Sarah needed to get up. She pushed herself up but then paused, "what the fuck." Sarah's pants and panties were gone. Just below her bare crotch, her legs were wrapped in some kind of resin cast just like her fingers. The cast all the way down to her toes. Sarah reached down and knocked on the cast, and it made a tough thunk sound that didn't sound hollow.

"What the actual fuck?"

A voice from behind Sarah responded: "Well, my dear you did sssay that you wanted to know how new viperssss are made... sssister."

Sarah rolled over so she could see behind her, she was on her belly and pushed up to look at Syntessa. "What did you do to me?"

Syntessa slithered closer, and responded, "My dear, you asssked how we Vipersss reproduce. We take exisssting femalesss and transssform them into our sssisterssss."

"I asssked... asssk...The hell?" Sarah stuck out her tongue and a thick muscular tongue with a flat forked tip stuck out. "Ogh my gudh." Sarah freaked out with her tongue extended out a foot before her eyes.

Syntessa leaned in and said: "Oh, that'ssss coming along nicely." Syntessa shot out her own tongue and wrapped it around Sarah's tongue with the forked end tickling Sarah's lips.

Syntessa leaned in, and reached her hand down below her breasts and began to rub herself. As Sarah watched, she saw Syntessa's scales seperate and expose a pussy. Syntessa dipped her fingers deeply into her dripping pink quim, with her fingers covered in goo, she then wiped her fingers along Sarah's newly extended tongue before she released it.

Sarah sucked her tongue back into her mouth inadvertently filling her mouth with Syntessa's pussy juice. Sarah wanted to retch, but the taste in her mouth was so good. It was all she could do to not start crawling towards Syntessa's cunt.

Sarah swirled her tongue around her mouth, until eventually she had swallowed Syntessa's cunt juice. "What the fuck wasss that?! I'm not a lessssbian. I've never had a lesssbian thought in my life!"

Syntessa approached even closer, "Ssssarah my dear, all Vipersss are lesssbiansss. We have no malessss."

Sarah tried to respond: "But, Dr. Valen-"

Syntessa cut her off angrily: "We do not ssspeak of the abomination. XCOM'sss desssstruction of that creature earned our ressspect.

Syntessa slithered even closer to Sarah, until her pussy was directly in front of Sarah's face. Sarah didn't know what to do. She wanted to get up and leave, but her legs were encased in some kind of cast. And as Syntessa approached, the scent of the viper's pussy made her mouth literally drool.

Syntessa placed her right hand on Sarah's head and simply said "lick." Sarah was almost in a daze as she extended her tongue, her unmodified tongue could have reached the inch to Syntessa's pussy, but after a minute of licking all over the Viper's cunt lips, Syntessa ordered her: "Deeper." And Sarah began exploring the inner folds. "Deeper", Sarah tunneled into the viper's quim. Her newly lengthened tongue reveling in the tastes and smells it was experiencing. Sarah had never had such a sexual experience in her life.

"Yessss," hissed Syntessa. "If you were not a lessssbian before, you are now, aren't you. Dig your tongue in deeper if you admit you are a lesssbian now." Syntessa hissed with delight as Sarah did just that.

For nearly 10 minutes, Sarah single mindedly explored Syntessa's depths. Before eventually Syntessa began to pull back. Sarah's viper tongue followed her until syntessa physically grabbed the tongue with her hands and extracted it from her cunt, kissing the forked tip on the flat, before she felt some tension and she let the tongue go which sprang back into sarah's mouth.

"Sssso, not a lesssbian?" Syntessa teased with a fanged grin.

"Ssssshut up"

Syntessa slithered around behind Sarah, who rolled over on her back to keep Syntessa in view.

"It'ssss only fair that I return the favor." Syntessa struck suddenly planting her face in Sarah's naked crotch with her viper's tongue stimulating Sarah in ways she had never experienced. As Syntessa's tongue thrust in and out, Sarah thrashed about in unbelievable pleasure.

As Sarah thrashed about in pleasure, the sand had worn down the back of the resin encasing her legs and soon there was a large crack sound. After repeatedly cumming, Syntessa withdrew her long cock-like tongue and slithered back. Sarah worked to regain her senses and tried to stretch. In doing so another crack was heard and the resin visibly cracked.

Sarah still couldn't kick her legs, "Yesss Ssssarah, sssstretch asss far asss you can."

Sarah tried to do a full body stretch and finally the resin cracked free. But Sarah was shocked by what she saw.

"What?! What the hell did you do to me?"

Sarah looked down as her lower body was exposed. Her lower snake-like body. Her legs had been subsumed by a tail that had been folded over on itself. From her exposed pussy it must have been 7 or 8 feet to the tip of her new tail...

her new golden scaled viper's tale.

Syntessa looked at the former XCOM sniper. "Ssssarah. You were meant to be one of usss. You will be one of the bessst of usss."

"No! I'll never join you."

"Yessss. We know of your motivationssss.

"What? No." Sarah looked horrified at the implication.

"Of coursssse. My missssion that night after our firssst visssit wasss to collect them."

Syntessa snapped her fingers and shouted "Asssh, sssend her in."