Family structures and relationships a crossword challenge

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Across
  1. 3. being married to two people at the same time
  2. 6. sexual relations between relatives
  3. 9. the process when someone legally joins a family they weren’t born into
  4. 10. when a woman has more than one partner at the same time
  5. 11. marrying within your family group or society
  6. 13. A family consisting of three or more generations
  7. 15. court ordered support paid by one spouse to another after being separated
  8. 16. family link that ties people together in society
  9. 17. a family, consisting of two parents and a child
Down
  1. 1. the legal or social union between two people as partners
  2. 2. marrying outside of your family group or society
  3. 4. a persons position or role in a family
  4. 5. when a marriage is declared as never existing
  5. 7. a person who shares a parent or parents with you
  6. 8. having one partner at a time
  7. 12. A family in which a sibling is the head
  8. 14. the legal separation of a couple