Am I just mean?

My boyfriend's (34) sister (23) lives with him and she is afraid of the dark.

He has siri activated lights in his house.
So he set up the hallways lights to go on when she's within a close radius.

He is often home, they have a dog and if she's home alone as its an apartment block the hallways light go on which would give her time to turn on the light.

I know it's not a big deal but it's one of the many things he does to "help" her.

I dunno she comes across very young for her 23 years. 😕 Observers perspective.