Second Uncle, You Committed a Foul

Uncle Wen, There Is a Big Age Difference

The hero's son invited the heroine to a class reunion at his father's place, and the classmates went there on their own. Only the heroine turned off the engine halfway and met the heroine, and then a series of stories happened. The male protagonist is married and his son is the same as his ex-wife (note: the male protagonist's son is the same age as the female protagonist)