This posture looks much like the lead character from the Hunchback of Notre Dame, with one shoulder up and one leg shortened, leading to a hobble of a walk.
Many women by mid-life experience scoliosis, sciatica, plantar fasciitis; it also leads to knee, hip and feet issues. I’ve see men leaning back and sitting on one buttock. This could pinch off nerves going down the legs over time. There can also be issues with the shoulders. Women can stick out their “sassy” hip, and put their hand on it.
As caretakers, it becomes easy to loose yourself in all the “Mommy, do this for me…” A young mother’s Baby on hip syndrome, where the hip juts out for a baby to ride, usually on the left hip (so you can work with the right hand) over time can lead to this.
I have heard Chiropractors admonish that if you sleep on your side, you need shift to sleeping flat on your back to prevent the torque on your spine. I have figured out, upon questioning, that many of these “twisted” people are sitting in a contorted posture like sitting on your foot/feet with knees to the side, that eventually the posture compensates.
Life can get complicated as you go on through time. I think mentally, this could be an aversion to dealing with things as they truly are, instead of standing in your own truth, and squarely standing on your own two feet, stacking the joints above evenly.
In dealing with the Quasimodo posture, I’ve seen that working the whole body has helped straighten out the whole posture. So even if you only have a hurt leg or shoulder, getting a massage for the whole body structure will help straighten things out.