With Nebula not yet begging to be his fucktoy Thanos called Gamora, Natasha, Wanda and Mantis over. He said to them "your future sister has not yet given into being a fucktoy like you my bitches. Now can you sexually stimulate her to do so". "Yes my master" they replied. With this Thanos left them to their work. Natasha immediately pulled the buttplug out of Nebula's arse and shoved in her fist and began fisting while she licked Nebula's delicious arse. Gamora who was still wearing a strap on removed the vibrator from Nebula's cunt and stuck the strap on in and began thrusting and she stuck the vibrator on Nebula's clit and also began to massage it. Wanda began to suck on Nebula's tit but she felt this wasn't enough. "Master can she please lactate her titty milk please" she said. "You wish is my command my slut" Thanos said and at this moment Wanda was pleased to find that as she suckled Nebula's succulent milk came gushing out. Seeing this Mantis who was sitting on Nebula's face still orgasming constantly, dripping her juices into Nebula's mouth leaned over and began to suck on her other tit. Thanos watched the action with enjoyment. He was pleased to see that all this extra stimulation was starting to make Nebula moan.
Thanos then decided that he wanted to get in on the action and he aimed his cock at the outstretched arsehole of Mantis. He slammed his cock into her virgin arsehole without warning. This made Mantis issue a cry of pain and stop sucking on Nebula's tit, but the cries quickly turned to moans and she quickly went back to her work. Thanos kept thrusting his cock deeper and deeper into Mantis's arse and as he came closer and closer to cumming he could hear her moans becoming louder and louder. Louder moans he was pleased to see weren't just coming from Mantis, but from Nebula as well. With this Thanos couldn't control himself any longer and he cummed deep in her arse. But he didn't let her keep it there for long though, as he transferred the cum into Nebula's mouth. Due to the gag still in her mouth she had no choice but to swallow it in order to breath. With this Thanos said to Mantis "you may stop orgasming and get off her face now my whore". She let out one final squirt and then did as he asked and stuck one of her hands in Wanda's and Natasha's pussies and began to pleasure them which made them moan while she went back to sucking on Nebula's tit.
Having freed Nebula's face from Mantis's pussy Thanos removed the gag in her mouth. With this he said to her "are you ready to beg to be my fucktoy my slut?" To his frustration she replied "go to hell." How could she he thought. He had even long ago replaced many of her body parts to make her more hornier and better at sex and yet she was resisting. This resistance didn't last long however as mere seconds after first refusing she said "I need dick". At this Thanos laughed and said "I told you to beg my slut". With this she replied "please fuck me . I need your cock inside my pussy. I will be your willing fucktoy. Please I just need to cum". Her having provided him with an offer that he had waited long for her to give, he smiled before putting the gag back in her mouth. With this he said to Gamora "move" so she moved and started fucking Mantis's arse instead much to Mantis's delight. Nebula wasn't off the hook yet however as instead of immediately plunging in his cock he rubbed it against her clitoris which left her even more horny and impatient for him just to shove it in. Once her moans were load enough to be heard through the gag he stuck his cock in like she wanted and began to thrust back and forth in her tight cunt. Taking pity on Nebula Thanos snapped his finger enabling her to cum. Which she did instantly swirling juices all over his throbbing cock. Within another minute Thanos found her cumming again. She really was a slut. She came several more times before Thanos was ready himself and he blasted his seed deep into her womb. This made Nebula cry out in pain (and Thanos had made sure to make it more painful for her) as being etched into her skin was the mark of the harem.
With this Thanos snapped his finger which transferred their cum into her mouth and she swallowed it greedily. Thanos wasn't done with her yet though. He pulled out of her cunt and pushed Wanda's hand in. She began fisting the moist pussy. With this Thanos snapped his fingers again this time making Nebula's gag now mostly disappear making it be one that just holds her mouth open. With this Thanos shoved his cock into her mouth and down her throat. This made her gag much to his delight. He then began to thrust his hips making his balls keep hitting her in the face. Nebula thought that this was the best thing that had ever happened to her being his fucktoy and enjoyed the sensation of his cock in her throat. Thanos feeling himself ready to cum quickly came deep in her throat but he had other plans for his seed so he snapped his fingers to give himself an endless orgasm and an endless stream of semen. With this he pulled out of her mouth and shot his sperm all over her body. Next he came all over the rest of his slaves. Once he was done there wasn't a single bit of any of their bodies that wasn't cum soaked. With this he released Nebula from her restrains and she and his other slaves started to clean each other up with their tongues. With this Thanos said "I am going away for a bit. Gamora as the harem queen you are in charge. Goodbye". With this he snapped his fingers and vanished…
Author's note:
I hope you enjoyed this. Feel free to use the poll up on my profile for voting on who should join next.