In this book the marriage and child arrangements are slightly different.
Lady Laena still dies leaving Daemon and his 2 daughters.
Aemond claims Vhagar and the lady Rhaena takes his eye instead of Lucerys as Aemond was about kill Baela
Laenor still leaves with his lover and his presumed dead by all except Rhaenyra.
Rhaenyra doesn't marry Daemon, therefore Aegon III and Viserys II were never born.
Alicent and Rhaenyra never have the fight so they stay OK friends.
So Rhaenyras children grow up with Alicents and Viserra takes a liking to Aemond but alas she was Rhaenyra's firstborn making Vis her mothers heir meaning she had marry Aegon.
But they were not cruel they let her wait until she started her periods and became a woman to marry the prince
Ages:
Rhaenyra- 31
Daemon- 47
Alicent- 33
Viserys- 51
Jacaerys- 13
Viserra- 13
Aegon- 16
Helaena- 15
Aemond- 14
Daeron- 13
Lucerys- 11
Joffrey- 4
Baela- 12
Rhaena- 12