IMO you should not allow her to return unless she gives up the A and shows commitment to MR. Reread Sandi's Rules. Sorry to be the one to tell you this... But what is her incentive to give up the A if you are constantly saving her. Allowing her to come back is cake eating.

In order for her to come back you should have an outline of conditions such as the ones described by Sandi.

Me 41
W 33
M 2013
Suspect A 11/15
Confirm A 1/16
She moved out 2/14/16
Stepson 13
Stepson 16