My mother in law / Father in law

She has a daughter who is 23 with autism and leaves her with my bfs grandma who is 84 years old btw We are staying with the grandma for a few months.. well she leaves her here because my bfs dad lives here and he’s his mom’s provider BUT HE WORKS and never has time to watch his daughter they leave her here for the 84 year old to watch.. mind you she wears diapers and isn’t able to shower herself she doesn’t get the right care she does everything alone.. she doesn’t have eye sight, she can’t hear, and she has a hunch back so she can hardly walk without a walker or wheelchair. I’m am SO disgusted how my mother in law and father in law can leave her here for the grandma to keep an eye on. Them two are in their 40’s and no longer are together and they are REALLY UNRESPONSIBLE to care for their OWN daughter. I feel so bad for my bfs grandmother who has to watch someone when SOMEONE should be watching her.. she’s in no condition to be watching anyone else’s kid. Someone needs to call CPS. And the grandma should get the right care she NEEDS.