My MIL is unique

she is all day in her room watching tv or youtube. She does not interfere in anything, we meet only at dinner ( i am a homemaker). I am sick lying in my room n we dint see each other for the past 4 days and she never came to see me. She knows everything from what her son earns to what we save and still she says I DONT INTERFERE (her fav line). I get cold vibes from her, nothing feels like family, she does not say but her actions, sarcasm at times makes me uncomfortable. what should I do? is she non interfering or just not concerned about me??