which had been off-loaded onto an external entity, in this case the husband, by her focusing on that entity in expense of her self-care.
Now, that entity is no longer there (to support that "self".)
That "self" needs a new home. But her own psyche is too feeble to receive.
Find a new external entity to nest that "self"? That may be an easier solution.
To rest that "self" on her own shoulders? That'd be ideal. Hope she can muster that courage.