Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: Only Fools and Horses
"Diamonds Are For Heather", the first depiction of Del's pining for a family. After taking to a young mother (whose husband had abandoned her) and growing attached to her son, he proposes to her, only to be turned down, her husband having returned asking for a second chance. It would be a long while before Del finally got to be a family man.