Siblings are expected to do nice things for each.
Mila and her sister like each other but are not very close.
Mila wants to feel loved by her sister.
Mila makes a point of regularly helping her sister as much as her sister helps her.
Mila regularly asks her sister for favors but rarely reciprocates.
Mila's sister feels loved and respected by Mila.
Mila's sister is always generous to Mila but feels taken advantage of.