MIL with mild Alzheimer symptom wanting to look after my LO

Just want to rant loudly. My in law has diagnosed with mild alzheimer, its just the starting and they want to occupied her so keep encourage her to come look after my LO. I feel so frustrated everytime she come over; then she tends to focus on one stuff and didnt look after my baby. ask her play with baby and she sometime will stunned there and dont know how to distract her from looking for me while i was working. sigh..