Mounted Camera: Still Queasy

What setting is it that can be turned off that would allow it so while on a land mount my wife doesn't feel motion sick?

Unless she's on her demon hunter (which she glides and leaps almost 100% with to avoid mounting) I have to mount on a two person mount just so she can get around.

Example: While on the back of my Obsidian Nightwing the mount rocks back and forth for the rider. (When standing idle it's worse). I don't see it since I'm driving, but the rocking/bouncing motion means she has to tab out until I let her know we've dismounted.

Some mounts aren't as bad for her, and it's especially not bad in the old world when flying.

Druid travel form doesn't seem to trigger it either.

I've tried camera addons without much luck/help. (DynamicCam being the main one I recall).

Just seeking some guidance/recommendations.