Why sex of course

"I have a sister, she is still young. Too young to kill a man by sex. You like sex, don't you? I could summon her if you let me. You can fuck her as much as you can take. As long as you are willing to let us go. You live and have a nice time. I will make sure she lets you have her proper. All holes. No rules. You can be brutal, you liked that with me, didn't you? Or else the rope wouldn't have kept me." He blushed and quickly looked away. Blushing is for innocent girls, not for a man who was standing in front of a succubus, dealing about the **** of her sister!

"Fine" he agreed. His cock still being a strong indicator of what he agreed to and what not. "But you turn away from me and stand still, I will put a knife on your throat and my hand on your cunt. If you summon anyone but her, or if you summon someone stronger than yourself to defeat me, I will use my powers again to make you cum. You noticed that, didn't you? I can make any succubus cum just by touching her, which is why they sent me to do this." He continued the fake story he started earlier. "So first I will drain you of even more power and then simply slit your throat before I do the same to whoever you summoned. So you better don't play tricks on me!"

Sure, he could have **** her into honesty with a deal with the devil, but his mana was, once again, not close to what he needed it to be. He had to find a way to either up his maximum amount, or the regeneration. Or both. So his choice was more mana saving and therefore the better one right now.

The succubus eagerly nodded and even put herself in front of him willingly, her ass pressed against his crotch. Was she trying to get him to fuck her again? Or maybe she was just teasing in her nature and didn't even notice. Both things were equally probable at this point.

Right after that, the succubus started moaning, nothing short of what you would hear in a porn. First John wanted to interupt her, but he quickly realized that this was how she summoned her sister. Right after he understood it, certain sister appeared and Johns eyes went wide. She clearly was still young, as she said.

"You have to be kidding me, right?" He stated and was tempted to **** her. He didn't even have a knife to cut her throat with, so he kept his hands behind her back, just in case. No need to reveal his underequipment. "She is a child!?" He looked at the young girl. She looked like she was not older than maybe ten. A quick observe gave only the basic information.

Young succubus, Level 2 creature

60/60 HP

This creature gains power through having sex with its victims. It takes part of their life energy by consuming their semen in her vagina. It's has a physically weak form that it needs to protect.

"Don't be stupid. She is of legal age. In your community even. She is 19 years old. It is not our fault that your system does not consider that we don't grow like weed, like you humans do." John gulped. So this was a 19 year old succubus...

"How old are you? And how fast do you grow, compared to humans then?" He asked, more out of curiosity, not real interest.

"I am 53 years old. We grow about half or maybe a third as fast as you do. Why do you ask? Would you rather have me after all?" She intensified the rubbing of her perfectly shaped ass up and down his cock. Teasing, but the undoubtful follow up of deadness was rather a turn off for John.

"So, if she is 19 that means she would be... 7 to 9 in human years. Biologically. And you expect me to really go..."

"Layklé, what the hell is going on here? Why did you summon me in this world? You know how dangerous it is for me to be out here!" The freshly appeared sister asked. So they do have names beside sexual slurs. But he guessed, she just saw him as food back then and there is no need to introduce yourself to your meal.

"Oh, dear sister, don't worry. I came to an agreement with this dear human. He will fuck you, since you can't kill him yet. No need to charm him, he knows what we are, so he will only give you so much as he can without dieing. Spread for him please." Layklé nonchalantly demanded of that young girl.