Jak, If my W sent me a letter like this, I would consider it a wake-up call, and would sit down with her and have a hearfelt conversation. I would appreciate the warning, and the opportunity to still work things out before it's too late.
Good luck.
CL
CL 53 W 54 M 20 yrs. 03'-09' Separation + Old Patterns + GAL 10-14' Piecing
"The Master allows things to happen. She shapes events as they come."