Ghost Mother (2007)

Nuntha had to care for her niece and nephews that her brother had left behind. When Nuntha finds out that Chai, her dead brother had worked as undercover agent to gather evidence on powerful criminals due to an unfortunate misunderstanding she was murdered as well. Nuntha, even in her death still worries about her nieces and nephews and how will they survive on their own so she continues to care for them as a ghost.

Unfortunately the movie Ghost Mother is not yet available on HBO Max.