Not the same husband, in emotional state that can involve having kittens (10)
I believe the answer is:
motherhood
'can involve having kittens' is the definition.
I can't judge whether this definition defines the answer.
'not the same husband in emotional state' is the wordplay.
'not the same' becomes 'other' (I've seen this before).
'husband' becomes 'h' (abbreviation).
'in' means one lot of letters goes inside another.
'emotional state' becomes 'mood' (your mood is your emotions).
'other'+'h'='otherh'
'otherh' put inside 'mood' is 'MOTHERHOOD'.
'that' acts as a link.
Can you help me to learn more?
(Other definitions for motherhood that I've seen before include "Woman's state of having children" , "Condition of some women" , "Maternity" .)