Mama Higurashi is the insanely permissive and understanding mother of Souta and
Kagome Higurashi. There's no information on what her actual name is, so she's
just going to stay "Mama" until it's revealed in canon - if ever.
It's not just her name that there's been little made know about. We also don't
know what she does all day. Does she work at the shrine? Does she work outside
the home? Does she not work at all and does stuff around the house all day? My
guess is that she either works at the shrine or does stuff around the house.
She's always around whenever Kagome comes back and she's always unshakably nice
and cheerful. No working single mom can stay that cheerful for that long.
Regardless, that's still just a guess.
If there's been little information available about Mama Higurashi, there's been
even less made known about her husband. The only information ever offered about
her husband is that he proposed to her under the The Go-Shin-Boku. There hasn't even
been a hint as to whether he's dead or simply works a job that keeps him away
for extremely long periods of time.
Still, the complete lack of information about her or her husband doesn't change
her role. She's an unflappable source of support for Kagome while she's in the
modern era. When she found out that Kagome was traveling back in time to fight
demons, she didn't bat an eye, ground her, or even lecture her. Instead, she
gave her a bike to take with her so Kagome could get around easier. How great
is that?