Half of her time is spent longing to see him again.
This one's tough... I have similar issues with my W. While she doesn't have "an OM" she has this belief of what life will be like with the OM when she finds him. It's almost harder to fight the "phantom OM" because while a real OM is who he is, warts and all, the phantom OM is who she wants him to be straight off the cover of a romance novel.
In your case... while there's a real OM, during the interlude periods I'm sure she "forgets" the warts and only thinks about the high points.
Married 6 together 8 Me:38 W:31 second marriage for both SS12, SD10, S6 Bomb: 9/8/11 (day before our 5 yr ann) W moved out: 2/18/12 D final: 11/12/12 Share S 50/50. Spend as much time as I can with SS & SD