It's bad to be unforgiving towards your parents.
Molly's sixteen birthday came and went without her busy parents even acknowledging it.
Molly wants them to know how upset she is.
Molly expresses her anger to her parents, and they apologize leading to her accepting the apology.
Molly won't empathize with her parent's reasons.
Molly accepts her parents are only human, and they become closer as a family.
Molly no longer trusts her parents to think of her, and they grow further apart.