Just looked at the pax's photos on the report -
Clearly shows that the whole row of seats 41DEF which the family had been allocated and checked in for has been removed and there is a big empty space!!
Assume that after take off the pax and it seems the CC crew thought it was all OK for them to sit all 3 together on the empty floor space where the seat once were - not a good move IMHO
Why this (the missing 3 seats) was not picked up by traffic/ops/load control/dispatch/CC/handling agents/ground rep etc etc before landing at MAH beggars belief when they knew they had a full load going home.