Even though I only played for 2325 in game days, somehow everyone aged by at least 20 years (I'm fifty). I found this in the code and I'm assuming it's the issue. It's saying in there that there are 84 days in a year. This issue has been happening since 1.5.6. To rule out mods as the culprit, I verified the files and then checked the code without launching the game. I only noticed it now because my siblings are in their forty's which is near the pregnancy age limit. I also uploaded my save game for reference.
// TaleWorlds.CampaignSystem.CampaignTime
// Token: 0x040006D4 RID: 1748
public const int DaysInYear = 0x54;
// TaleWorlds.CampaignSystem.CampaignTime
// Token: 0x040006D4 RID: 1748
public const int DaysInYear = 0x54;