Claudette

"'I got the results of the test back. I definitely have breast cancer.'" Claudette is Lisa's mother.

In "The Room"
Claudette is quite severe and stern.

In the scene where Chris-R demands his drug money, she scolds Denny after he is rescued by Johnny for getting involved with drugs (whether he's been taking them or merely selling them for Chris-R is unclear) and urges Lisa to call the police.

She reveals to Lisa that she has been diagnosed with breast cancer, but no more is said about the issue afterwards.