What is the fine-grained topic of the following text: Each vignette introduces a new set of people and events; a father lectures his son on grammar and politics; a boy returns from boarding school to discover his mother's infidelity; a senile grandmother doesn't recognize her own sons at Thanksgiving dinner; a daughter, her marriage a shambles, pleads futilely to return home, etc. Only return the topic.
Family dynamics and personal struggles in various vignettes.