If your mother were to disinherit her adult daughter voluntarily, it would be best to mention her by name that she has been disinherited, leave them a token amount and/or include a "no contest" clause ...

To save her from being homeless after the eviction, my husband and I let my mother-in-law move in with us for 6 months, but it quickly became an untenable situation as my husband and his mother do not ...