My Dad had one that was supposed to be used in an emergency, since he was disabled. It called one of my brothers.
Within a couple of years, he was using it whenever he got a bit bored or lonely. It drove my brother nuts - the phone would go off at 3am, he’d leap out of bed and drive over to Dad’s house, let himself in, and find he’d gone off to sleep again, or he just wanted a chat. If he was feeling a bit low, he’d push the button several times a day. My brothers took it in turns to respond, but it was really hard for them because my Dad constantly misused the alarm, but we knew that one day it just might be a real emergency.
Do make sure her family are ok with this before she goes ahead.