My son inherited my Diamond status when he was under 18. Now, several years later, he still has the status, but not the point total. That is accurate with the number he has earned on his own. Daughter is Diamond in her own right, but also reflects her proper point total she sailed.
Fast forward to now. Cruising with my granddaughter soon and we will see how her status reflects after her first sailing. Talked to the C&A Dept and the lady I spoke to insisted that they will only status match with only the father or mother at the request of the parent. So much for mixed family units. 🤦♀️ Stay tuned....