Satisfied about husband backsliding? Not us (4)
I believe the answer is:
Here is my best explanation:
'not us' is the definition.
(I've seen this before)
'satisfied about husband backsliding?' is the wordplay.
'satisfied' becomes 'met' ('meet' can be a synonym of 'satisfy').
'about' is an insertion indicator.
'husband' becomes 'h'.
'backsliding?' says the letters should be written in reverse.
'met' enclosing 'h' is 'meht'.
'meht' back-to-front is 'THEM'.
(Other definitions for them that I've seen before include "people objectively", "Not us!", "Certainly not us, the other lot", "Those people (as object)", "Others", "Perhaps, the Opposition", "Let -- eat cake", "(To/from) those people" and "... in another case, they".)