If her house is built on a slope she may have a walk-out crawl space. At times, some people in california use the not technically correct term basement for crawl space. Not sure if “walk-out crawl space” is correct terminology either but it does have that difference from most crawl spaces here.That’s what I used and have heard and seen used. Sometimes people even finish the taller parts of the crawl space, maybe even build interior access to it. They might call this finished space the “basement”.