What would happen if four families each contributed one member to create a new family?

Family Swap 3 (2021)
NC-17
07/16/2021 (US)
01h 48m
What would happen if four families each contributed one member to create a new family?
Includes Family Swap 2, Family Swap, Family Swap 3, Family Swap 4, Family Swap 5 and Family Swap 6