Fontaine's mother is likely no longer alive.
The Truth About Fontaine's Matriarch
In the narrative, Fontaine and Yo-Yo initially sought refuge in what they believed was their matriarch's home. However, the true circumstances surrounding Fontaine's mother are more somber. It is revealed that she is likely deceased.
Fontaine's Communication
Throughout the period, Fontaine was not communicating directly with his living mother. Instead, he was unknowingly interacting with a recording device situated in an otherwise empty room. This recording provided a sense of comfort and stability for Fontaine, effectively pacifying him despite the absence of his actual mother.