It's 11 PM and I'm getting married tomorrow

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Across
  1. 2. Eldest of their generation, familiarly
  2. 5. Third nibling
  3. 6. Burque murderbird
  4. 8. First nibling
  5. 10. Birthplace of him
  6. 12. Second nibling
  7. 15. Father of him
  8. 16. Canine resident of 2612
  9. 19. A lot of miles to drive (x 1000)
  10. 20. Meeting place...not so small plates
  11. 21. Mother of 5 across
Down
  1. 1. Mother of 8 and 12 across
  2. 3. He's in a 9 down state of mind
  3. 4. Their alma mater, in short
  4. 7. Proposal site, Port ___
  5. 9. Her place of residence after 14 down and before NM
  6. 11. It's a four letter word, par-don my French
  7. 13. Mother of her
  8. 14. Birthplace of her
  9. 17. Mother of him
  10. 18. Aussie murderbird