Demanded to be at home with little girl and boy (8)
I believe the answer is:
insisted
'demanded' is the definition.
(I've seen this before)
'at home with little girl and boy' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'with' is a charade indicator (letters next to each other).
'little girl' becomes 'sis' (short for sister).
'and' means one lot of letters go next to another.
'boy' becomes 'ted' (short for Edward or Theodore).
'in'+'sis'+'ted'='INSISTED'
'to be' acts as a link.
(Other definitions for insisted that I've seen before include "Maintained firmly" , "Tidiness (anag.)" , "Declared or demanded emphatically" , "... repeated" , "Demanded firmly" .)