JawDrop - Universal Mouth Opener

[riveth]

JawDrop - Universal Mouth Opener

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About This File

 

A true jaw-dropping mod! Like… literally.

 

Originally made to force the player’s mouth open during oral animations, Jaw Drop has grown into a full facial expression control tool for AAF scenes.

 

Some animations forget to open the mouth, close it too early, or use an expression that doesn’t fit the moment. This mod lets you override that — and keep your chosen look active for as long as you want.

 

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Features

 

Upper face (eyes) — 3 toggle presets

- Closed tight

- Wide open

- Half-closed

 

Lower face (mouth) — 3 toggle presets

- Open (blowjob / oral)

- Clenched teeth

- Smile

 

Each preset is a **toggle** (press again to turn off) and can be combined freely — e.g. half-closed eyes + open mouth, wide eyes + smile, etc.

 

Intensity control

- Separate MCM slider (0–100) for every preset

- Morph values scale proportionally with the slider

 

AAF integration

- Actively overrides AAF face morphs while a preset is active (timer-based lock)

- Automatically resets the face when the AAF scene ends

- Soft dependency — works without AAF, but shines with it

 

MCM

- Hotkeys for all 6 presets

- Intensity sliders under each option

- Toggle for debug notifications

 

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Why you might need this

 

Blowjob animations that leave the jaw clamped shut, pleasure faces that look wrong for a rough scene, or any moment where the default expression breaks immersion. One hotkey, and the face stays the way *you* set it.

 

Works with **AAF 1.0+** (real player character, not a clone). Should also work with NAF.

 

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Technical notes

- ESL-flagged (does not take an ESP slot)

- Soft dependency on AAF

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• Submitter
  riveth
• Submitted
  07/28/26
• Category
  Other
• Requirements
  Fallout 4
  F4SE (Fallout 4 Script Extender)
  Mod Configuration Menu (MCM)

 

[judge007]

17 minutes ago, riveth said:

JawDrop - Universal Mouth Opener

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A true jaw-dropping mod! Like… literally.

Nice !

Works with AAF 1.0+ (the version that uses the actual player character, not a clone) and should also work with NAF.

Which is the first version of AAF that doesn't use a doppleganger?

 

 

 

 

 

[riveth]

1 minute ago, judge007 said:

 

Well, since You asked I'm not so sure anymore.  Anyway it need to use actual player body and not doppelganger.

[Hoobu]

This might be good for eating out a chick nom nom nom 😁

[kziitd]

I really like mods with these kinds of clever little touches.
I hope to see more mods like this; if you have an idea but lack the resources, feel free to ping me on the Ego server.

[riveth]

4 hours ago, kziitd said:

I really like mods with these kinds of clever little touches.
I hope to see more mods like this; if you have an idea but lack the resources, feel free to ping me on the Ego server.

I sure will!  And I do remember about that unconscious animation for SH. I will be less active now due to family vacation but will get in touch eventually. Thanks!

[spicydoritos]

This is a great idea.  I love having ways to fix intermittent animation problems while the animation is still running. 

[Kruze]

Doesn't seem to be working for me. I have it installed, set a hotkey, activate it and see a message about opening mouth or closing mouth... but no animation of an open mouth.

[riveth]

1 hour ago, Kruze said:

Doesn't seem to be working for me. I have it installed, set a hotkey, activate it and see a message about opening mouth or closing mouth... but no animation of an open mouth.

Does it work outside AAF?

 

Edit: if it works outside AAF animation it means You have old AAF beta that use doppelganger. Your invisible body clapping jaw somewhere else and You are watching your clone do a sexy scene. 🙂

 

Just update AAF and enjoy jaw dropping experience 

Edited July 31 by riveth

[Kruze]

On 7/31/2026 at 1:37 PM, riveth said:

Does it work outside AAF?

 

Edit: if it works outside AAF animation it means You have old AAF beta that use doppelganger. Your invisible body clapping jaw somewhere else and You are watching your clone do a sexy scene. 🙂

 

Just update AAF and enjoy jaw dropping experience 

No, it didn't work anywhere

[4nln415]

Previous version worked for me.  

 

Just here to say is the ahegao dream coming true? 

Using Screen Archer I'm under the impression you can't move eyes individually? 

[riveth]

3 hours ago, 4nln415 said:

Previous version worked for me.  

 

Just here to say is the ahegao dream coming true? 

Using Screen Archer I'm under the impression you can't move eyes individually? 

As far as I know you can't control eye movement manually. But you can order player to look at something. I wonder if we order to look at something invisible just before player eyes would that make that face expression?  🙂

[judge007]

3 hours ago, 4nln415 said:

Previous version worked for me.  

 

Just here to say is the ahegao dream coming true? 

Using Screen Archer I'm under the impression you can't move eyes individually? 

 

1 minute ago, riveth said:

As far as I know you can't control eye movement manually. But you can order player to look at something. I wonder if we order to look at something invisible just before player eyes would that make that face expression?  🙂

TSEX Hardship & TSEX have a way to alter expressions, which seems to include the eyes . . .

Or I'm imagining it, lol!

[riveth]

5 hours ago, Kruze said:

No, it didn't work anywhere

This mod is just a bunch of console commands tied to a hotkeys. There is not much to break.

 

Have you tried new version?

[riveth]

1 minute ago, judge007 said:

 

TSEX Hardship & TSEX have a way to alter expressions, which seems to include the eyes . . .

Or I'm imagining it, lol!

I can set allready made expressions np. But those expressions doesn't move eyeballs directly. Expressions change eyelids position but PC is still watching passing ppl ect. You can't force ahego face eyeballs and froze them in that pose.

[MSM_Alice]

12 minutes ago, riveth said:

I can set allready made expressions np. But those expressions doesn't move eyeballs directly. Expressions change eyelids position but PC is still watching passing ppl ect. You can't force ahego face eyeballs and froze them in that pose.

I've looked into this a while ago, by default it is not there, it seems Bethesda didn't bother to put actual gaze convergence in.

However, there might besome info/ altpaths here if  you parse this thread:
Intentional strabismus (cross eyed) effect on eyes, how - if possible? - Creation Kit and Modders - Nexus Mods Forums

Edited August 3 by MSM_Alice

[woodrealmelf]

hello is this like sex expression mod for skyrim? and does this apply automatically or need to setup manually in scenes?

[riveth]

2 minutes ago, woodrealmelf said:

hello is this like sex expression mod for skyrim? and does this apply automatically or need to setup manually in scenes?

No, this mod allows you to set predefined expression during animation. It is aimed to fix animation that failed to open jaw on oral scenes or set facial expression more fitting for scene. For example it let you clamp your teeth when gang raped by super mutants instead of slacked face like nothing happens.

You need to use hotkey.

[Cealapa]

All settings work perfectly for me, good idea with facial expression  (no immersion when PC is raped for example and she looks like nothing happens, no sorrow or even joy 😄).

 

It was a little bit difficult to find free keys for all settings though.

 

Thanks! 

 

Edited August 3 by Cealapa

[riveth]

2 minutes ago, Cealapa said:

All settings work perfectly for me, good idea with facial expression  (no immersion when PC is raped for example and she looks like nothing happens, no sorrow or even joy 😄).

 

It was a little bit difficult to find free keys for all settings though.

 

Thanks! 

Glad You like it. Having not enough keys on keyboard is also my problem. That's why I used half expressions (separate for eyes and mouths). Mixing them would give much more variations than that 6 keys.

[woodrealmelf]

hello is it possible maybe whenever u activated the hotkey it will somehow save in that particular event like for example the picture above, so whenever it happens again it triggers the facial expression? tho that might be difficult

[riveth]

7 minutes ago, woodrealmelf said:

hello is it possible maybe whenever u activated the hotkey it will somehow save in that particular event like for example the picture above, so whenever it happens again it triggers the facial expression? tho that might be difficult

Well that info would need to be saved into animation files themself. I don't know if that is even possible, but the idea is very interesting!

[kziitd]

2 hours ago, riveth said:

Glad You like it. Having not enough keys on keyboard is also my problem. That's why I used half expressions (separate for eyes and mouths). Mixing them would give much more variations than that 6 keys.

Actually, I’d suggest incorporating the game's built-in animated expressions into your hotkeys. This means a single hotkey would simultaneously trigger a vanilla animation—such as happy, sad, angry, nervous, or surprised. These animations already establish a clear emotional base and include inherent changes to the eyes and eyebrows.
You can then layer the specific, constant morph ID values you want to activate on top of that animation.
This approach yields much better results when the hotkey is triggered, as the vanilla expressions are fully animated.

These are also the animated emoticon annotations called within the hkx file (in case you happen to think those internal test animations of mine look good in some way).

[riveth]

3 minutes ago, kziitd said:

Actually, I’d suggest incorporating the game's built-in animated expressions into your hotkeys. This means a single hotkey would simultaneously trigger a vanilla animation—such as happy, sad, angry, nervous, or surprised. These animations already establish a clear emotional base and include inherent changes to the eyes and eyebrows.
You can then layer the specific, constant morph ID values you want to activate on top of that animation.
This approach yields much better results when the hotkey is triggered, as the vanilla expressions are fully animated.

These are also the animated emoticon annotations called within the hkx file (in case you happen to think those internal test animations of mine look good in some way).

Emotions are already in script, but hushed for now as I did not have enough time for testing.

 

I planned to use expressions and morphs together for better effect, while keep morphs additive. That would allow for even greater amount of combinations without need for more hotkeys.

[biggye]

Slightly related, but do you have a preset for the female model you used in the preview images?

 

Really enjoying the mod so far!