Describing the newest picture of Britta

So here's the latest picture I found on line of Britta Ann Green McGuire Flynn. I found this by googling her name and clicking on the Ancestry entry saying "Possible pictures of Britta Ann Green McGuire Flynn"; then doing a screen capture. Many, many thanks to the cousin who posted it in January.

Where was the picture taken? When? And who are the other two people in the photo?

A general description:

This is a photograph as opposed to a daguerreotype. Britta is sitting on the step of a house between two women. She is wearing a dark dress with a stand-up but narrow collar. Her hair is parted in the middle and pulled back. The woman on the left is wearing a dark, single-breasted coat with overly wide lapels. Her short hair is parted on the right side. The woman on the right is wearing a light-colored coat/jacket with thin, not mutton, sleeves and a long skirt underneath.  Her hair looks short but may merely be pulled back.

Since there's no record of Britta ever leaving her home state, we can assume this picture was taken in Alabama. More than that is impossible to say at this point.

The reason that the hairstyles and fashions may be important is that they can help us date this picture. Britta must have loved having her picture taken because she did it so often. However, her manner of dress and hairstyle never changed much from the first picture we have of her. No help in dating there.

Britta died in 1919, so the picture must have been taken prior.

About 1917 seems to be right because:

The young ladies hairstyles and coats are typical of the year 1917, though to be safe we should say "around 1917." At the time Alabama was not the center of the fashion world, though interested young ladies would have known the current styles from available newspapers and magazines.

The website https://witness2fashion.wordpress.com shows these coats a la mode in 1917:

https://witness2fashion.wordpress.com/tag/womens-coats-1917/

Part way down the page, notice the high lapels which look funny when open, and compare them to the coat on the left.

Of course the picture could have been taken before or after 1917, so to be safe, let's say it was taken 1915 - 1919 based on the fashions and the hairstyles of the young ladies.

As to the identities of the other two women in the picture, the cousin who posted this picture didn't know who they were. My first impression was that they resembled Carrie and Bessie Edins, daughters of Mary Drusilla McGuire and Simmin Edins, based on the picture found here:

http://mv.ancestry.com/viewer/f7a201be-bef4-48f6-abe4-96708510673a/11081306/-514579813

My other cousin confirmed in an email that my impression was hers, too.

And so, here's my best answer for the where/when/who questions:

This is a picture taken in Alabama of Carrie Edins, Britta Ann Green McGuire Flynn, and Bessie Edins about 1917 ± 2 years.

Thanks to everyone who helped.