u/ThiccRedhead_uwu

We live together (working on saving to move) We do everything for his parents. His mother doesn't do anything anymore because she claims to be "sick" and she's used that excuse for 20years according to my S/O She's very intrusive always asks us where we're going what we did, what we ate asks me about what type of medication I'm on...... She is completely unaware that she should have boundaries because as she's stated before on multiple occasions ' I'm the mother"... How can I set a boundary without sounding like a n asshole?