This doting mother is a cellar spider, Pholcus* sp. These spiders are probably the ones I encounter most frequently. As a pest control technician, I crawl into dark, cramped spaces, shining my flashlight into various nooks of the great indoors. I have long suspected that cellar spiders--which in the pre-human wild would have lived in shallow caves and the hollows of dead trees--are far more numerous now than before we provided all this habitat. I leave these animals alone to help me do my job, catching flies, and probably lots of other spiders.
*
Greek pholkos (φολκος)- "bow-legged"