Who is Bick, Paul, Vic, Tree (Teresa), Joey, Monica from The Deep End of the Ocean and what is their importance?

These are siblings and their spouses of Beth and Pat Cappadora

Bick (Benjamin) is Beth's younger brother. Ben is named after Bick.
Paul is Beth's older brother.
Tree is Teresa, Pat Cappadora's sister. Joey is her husband.
Monica is Pat's unmarried sister.