These are pages from Sara Northrup's Divorce complaint. It seems that the marriage was rather "rocky". The complete document can be found here. View attachment Divorce-1.jpg
Reading further in Wikipedia it seems that after his death Alexis signed an agreement not to speak of CoS or LRH in return for a settlement. They also tried to get her to sign a document stating that LRH Jr was her father. Are there dox on that?