Hi everyone, this is my 2nd subclass idea that I have created and I think will be fun to play. I would be happy if you lovely people would like to try this class for your one-shot and give me some feedbacks. Would really eager to hear some feedback and comment about it. 

Succubus Descendant

You are a creature that represents lust, as your innate magic comes from the lust of an incubus or succubus. The reputation of sorcerers with this origin is considered demonised and was outcast by most of the population. Most sorcerers under this origin are usually the first born of the parents (whether through the incubus or the succubus).

Fiendish Spawn

You are a spawn of a fiend either from a succubus or incubus. You can speak, read and speak either Infernal or Abyssal.  

Alluring beauty

Starting at 1st level, you have advantage in persuasion and performance check due to your captivating charm. In addition, you know the spell Charm Person, which doesn’t count against your number of sorcerer spells known. You can use this spell according to the number of your charisma modifier before needing a long rest. 

Lustful Dream

Starting at the 6th level, when you cast a spell that successfully charms a creature, you can create a lustful dream that allows you to drain their life essence. Creatures that are charmed by you will have disadvantage in Wisdom Saving throw and for every sorcery points you spend (maximum of 5) , you can deal 1d6 psychic damage as a bonus action. 

You can use this ability equal to your number of your Charisma Modifier.

Wings of Lust

Beginning at the 14th level, your succubus/incubus blood runs through you deeper, allowing you to have the ability to sprout a pair of wings from your back, gaining a flying speed equal to your current speed. You can create these wings as a bonus action on your turn. They last until you dismiss them as a bonus action on your turn. 

You can’t manifest your wings while wearing armor unless the armor is made to accommodate them, and clothing that are not made to accommodate your wings might be destroyed when you manifest them. 

True Lust

Beginning at the 18th level, you can spread your lustful pheromones inherited from your ancestor, causing those around you to become awestruck or in love with you. As an action, you can spend 4 sorcery points to draw and spread out your pheromones to a distance of 50 feet. For 1 minute or until you lose your concentration (as if you were casting a concentration spell), each creature of your choice that starts its turn in the area of effect must succeed a Wisdom saving throw or be charmed until the aura ends. Creatures that succeed on this saving throw are immune to your aura for 24 hours.

I like the idea of this origin, but I'd suggest that you give the subclass some extra spells similar to the Tasha's subclasses, for instance it could be:

Deceitful Magic (Instead of Alluring Beauty)
Starting at 1st level, you learn additional spells when you reach certain levels in this class, as shown on the Deceitful Magic table. Each of these spells counts as a sorcerer spell for you, but it doesn't count against the number of sorcerer spells you know.
Whenever you gain a sorcerer level, you can replace one spell you gained from this feature with another spell of the same level. The new spell must be an enchantment or an illusion spell from the sorcerer, warlock, or wizard spell list.

Fiendish Spawn
You are a spawn of a fiend either from a succubus or incubus. At 1st level you can read, speak and write either Infernal or Abyssal.

Lustful Dream -6th Level-
(I'd rework it this way)
Creatures succesfully charmed by you have disadvantage on their subsequent saving throws to end the charmed condition.

Also, as a bonus action you can choose on creature charmed by you and spend a number of sorcery points up to your Charisma modifier, to deal psychic damage to them equal to twice the points spent. You regain a number of hit points equal to the damage dealt this way and this damage doesn't affect the charmed condition neither trigger a saving throw to end it.
You can use this bonus action a number of times equal to your proficiency bonus before a long rest.

Wings of Lust
(well this is similar to Draconic Wings, I'd leave it the same)

True Lust (it could be Lustful Void, I'd rework it this way).
Beginning at 18th level, as an action you can spend 5 sorcery points to emanate an aura of 30 ft. that is centered on you and moves with you, and lasts for 1 minute. Whenever a creature begins its turn within the aura, that creature must succeed on a Wisdom Saving throw against your Spell save DC. If it fails, the creature becomes charmed by you for the duration of the aura, and whenever you use your bonus action to damage that creature with your Lustful Dream feature, the damage equals to thrice the sorcery points spent.
If the creature succeds on the saving throw, it cannot be charmed this way again for 24 hours and your Lustful Dream feature cannot be applied to them for the same time (even if you charm them with your spells or by any other means).
Once you have used this feature, you cannot use it again before you finish a long rest.

I hope you find my suggestions useful even if you not take them, at least to think of it a little more. I'd really consider the extra spells, because after Tasha all the other sorcerer subclasses have been left behind on that matter. Hope you have fun with your homebrew anyway.
 

Interesting concept but missing something.  I'd try to include a feature or two that makes use of the Succubus real trademarks. 

1st: Fiendish Spawn is fine

1st: Alluring beauty should specify the advantage on persuasion and performance to be in relation to seduction checks made to cultivate a targets personal interest in you (versus other uses of those skills).  A target whose affinity towards you has been increased by at least one step gains disadvantage on saves against your ability to charm and/or dominate them.

3rd: don't know why it's missing but add those extra spell list for Deceitful magic from vanadis's suggestion.

6th: Lustfull Dream should allow for the making of a suggestion which at 18th level becomes a Geas and doesn't necessarily require them to be charmed first, merely seduced into having you on their mind.  Said suggestion among others might be: "upon waking, beseech from you a good morning kiss."  The kiss is the means of dealing psychic damage/draining their energy.  @14th level the kiss may let you deal psychic damage to recharge sorcery points, or spell slots rather than HP.  The suggestion could also be a means to influence their alignment.

wings is fine.

18th, I'd go with dominate rather than charm.

Quote from Vanadis_Alcyone >>

I like the idea of this origin, but I'd suggest that you give the subclass some extra spells similar to the Tasha's subclasses, for instance it could be:

Deceitful Magic (Instead of Alluring Beauty)
Starting at 1st level, you learn additional spells when you reach certain levels in this class, as shown on the Deceitful Magic table. Each of these spells counts as a sorcerer spell for you, but it doesn't count against the number of sorcerer spells you know.
Whenever you gain a sorcerer level, you can replace one spell you gained from this feature with another spell of the same level. The new spell must be an enchantment or an illusion spell from the sorcerer, warlock, or wizard spell list.

Sorcerer Level	Spells
1st	Charm Person, Disguise Self
3rd	Alter Self, Suggestion
5th	Fast Friends, Hypnotic Pattern
7th	Charm Monster, Grater Invisibility
9th	Dominate Person, Far Step

Fiendish Spawn
You are a spawn of a fiend either from a succubus or incubus. At 1st level you can read, speak and write either Infernal or Abyssal.

Lustful Dream -6th Level-
(I'd rework it this way)
Creatures succesfully charmed by you have disadvantage on their subsequent saving throws to end the charmed condition.

Also, as a bonus action you can choose on creature charmed by you and spend a number of sorcery points up to your Charisma modifier, to deal psychic damage to them equal to twice the points spent. You regain a number of hit points equal to the damage dealt this way and this damage doesn't affect the charmed condition neither trigger a saving throw to end it.
You can use this bonus action a number of times equal to your proficiency bonus before a long rest.

Wings of Lust
(well this is similar to Draconic Wings, I'd leave it the same)

True Lust (it could be Lustful Void, I'd rework it this way).
Beginning at 18th level, as an action you can spend 5 sorcery points to emanate an aura of 30 ft. that is centered on you and moves with you, and lasts for 1 minute. Whenever a creature begins its turn within the aura, that creature must succeed on a Wisdom Saving throw against your Spell save DC. If it fails, the creature becomes charmed by you for the duration of the aura, and whenever you use your bonus action to damage that creature with your Lustful Dream feature, the damage equals to thrice the sorcery points spent.
If the creature succeds on the saving throw, it cannot be charmed this way again for 24 hours and your Lustful Dream feature cannot be applied to them for the same time (even if you charm them with your spells or by any other means).
Once you have used this feature, you cannot use it again before you finish a long rest.

I hope you find my suggestions useful even if you not take them, at least to think of it a little more. I'd really consider the extra spells, because after Tasha all the other sorcerer subclasses have been left behind on that matter. Hope you have fun with your homebrew anyway.
 

 Keep Alluring Beauty, even if you add extra known spells.  Subclasses for other classes gain a special feature AND additional spells.  

Also, the capstone seems to be too similar to Draconic Bloodline's Draconic Presence.  Make it a little more unique.  Otherwise, I like the concept of the whole subclass.