What Steve said is true in my M. 50 is a biological threshold for many Ws. The changes she says she is making may or may not happen. Continue working on yourself. Moving closer to becoming the H only a fool would leave. Care for your S and yourself.
You can't fix her. Read and Post and be patient.
M 53 W 54, M since 98 D15, D19 8/2013 discovered EA, W maintained contact with OM until 10/14 7/2/17 W said she wanted S, 7/25/17 moved out of MBR 12/17 W says moving out 5/18, W still in home.