Take out the stuff about you getting divorced soon and about you failing to protect your family
Do NOT SHOULDER BLAME for your marriage to MIL... She will just BLAME YOU THEN...
Don't attack her daughter either... Just tell her that OM is taking advantage of her daughter when she's vulnerable... I can't imagine MIL is going to take kindly to you telling her that her daughter is lying.. especially w/o any PROOF of it at all...
