Live Photo on 5S (enabled?)

My mother-in-law asked me to look at her iPhone because her pictures were moving. I checked it out and it appeared that they were live photos (moved a little when flipping from picture to picture in photo app and would play when you hold it down). Not that weird but she has a 5S; not a 6S or newer. I checked her camera app (stock apple app) and the live photo button is there and you can take live photos.

Any other 5S's have the live photo enabled or is it just her? Kinda of a weird but good problem (I guess).

FYI - it's not jailbroken or anything. This just started after she upgraded to 10.2