Yes, tell her that the windows of opportunity were opportunities and that a time needs to be confirmed. Business-like is the proper approach. Keep pursuing in check but she needs to understand that your home is not an open door sitch.
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.