Simple. If she does something (her behavior) that bothers you then bring it up. Very calmly, state the boundary and the consequence for breaking it. Lot's of info on the web about setting boundaries.
M22,H45,W45 S21/18D12 Retain faith that you will prevail in the end, regardless of the difficulties and at the same time confront the most brutal facts of your current reality, whatever they might be.
