Broken, Steve may not feel, or think the same way, but as I understand from all that he has written, Sue has often stated that she wants a man that "wants her" whereas Steve, to feel fulfilled as a Cuckold, derives his greatest 'desire' for his wife, Sue when she desires to 'have' another man instead of him.
It's Not that Steve doesn't want her, he does, and Sue knows that he does, but he "wants her" to the level that she wants to be "wanted" when she has another 'lover.'
In the last months, she has come to understand all this more clearly from their more candid discussions. Certainly, her pen pal has helped her to understand it better, And she has acknowledged that to Steve.
Hope that helps.
Cheers, Harry