Grant Bovey isn't so much Anthea's "husband" but rather part of Anthea's "decor", like some sort of coffee table.
She'll never divorce him, unless she decides to completely redecorate.
The spectre of having to start all over again at her age is probably not appealing to her, not least when you consider the furore she weathered to hook the slimy Bovey in the first place.
She'll hang on in there. Now she's having to experience life on the other side of the fence as the wronged wife.