Uncle Buck (1989)

In the Chicago suburbs, Tia, Miles, and Maizy return home after school. Tensions arise between Buck and his girlfriend, Chanice. Buck agrees to babysit the kids while their parents are away, and despite Tia's initial resistance, the family begins to bond. Buck faces challenges but grows closer to the children. Tia tells Chanice that Buck is cheating on her, causing further complications. Buck gets drunk and plans to go to the race track the next day but realizes he has no one to babysit. He searches for Tia and confronts Bug, the boy she is with. Buck and Tia reconcile, and Buck becomes a valued member of the family.