When she returns to her feet, she will be back to normal.
I continued planning the rest of my house for a time, and then lo and behold, naked Lydia comes back from.
It should be noted that, similar to other followers, there are multiple options to change her gear.
However, there is another community out there that absolutely loves to make their game a bit more, ahem, realistic and busty.
If she has a helmet in her inventory, she will then equip that and remove the robes.
Alternatively, sprinting into her will stagger her back.
Hips will swing with this animation replacer.
If you just want naked skins and a simple sex mod, get the and you want, and then.