80’s RomCom

I have been racking my brain trying to figure out what movie this end scene is from that plays in my head every so often. The details are fuzzy but all I can remember is the groom has a nephew or close relative who the groom adopts at the end. The bride and groom get married in a backyard or outside wedding and the movie ends with them and the boy hugging and taking pictures as a family. PLEASE help me!! What movie is this??