I think you have had a lot of positive signs. She is very attached to you and unwilling to really let go. If you were to behave like a real divorced couple, she would likely be very upset.
As she should be. Sleeper fulfills her needs that OM doesn't fulfill. So she gets what SHE needs from both of them while neither get their needs met.
Sleeper, let her go. Drop the rope. She "ain't" your baby. She's nobodys baby really.
This dance keeps you in limbo. Tip the scales and change the dynamic. As long as you want her back, and she KNOWS it, she gets what she wants from you and also from OM.