Mark is a Jewish man who married Tracy.
Thanks to Bart, the mail carrier thought that the Simpson family lived at 74 Evergreen Terrace, where the Weingarten family actually lives. The family started to get the Weingarten family's letter and packets, including an invitation for Scott and Brenda Weingarten to Mark's and Tracy's wedding. Homer and Marge went to the wedding instead of Scott and Brenda. Homer made a speech to the bride and groom at the wedding, making them both confused, because they thought Scott was blind.