just because she's sociable and out all day with friends and boyfriend.
Brother is less sociable and home all day and getting all the chores.
Admittedly she's not always eating with us but the food is being purchased just in case she does decide to come home and eat (another issue!).
She does her own washing and is in charge of cleaning her own room as is her brother (which she doesn't do). We fund them both to the tune of several thousand pounds a year to top up her student loan and provide a car.
The dog still needs walking, the plants need watering, shopping needs doing etc etc. DP and I can do it all without either of them but really what does that teach them about contributing to family life?