11.
“My cousin is actually my sister. Apparently my mom got pregnant really young and her much older sister adopted my sister and raised her as her own. It was actually an amazing moment when we found out. My cousin (sister) and the sister I was raised with and I are really really close. Just happened last year. We’re all old now (I’m 50 and my cousin/sister is 58) so it’s just a really neat thing that makes us all happy.” –voice_of_craisin
12.
“We found out after my grandfather died that none of his seven children with my grandmother were his, and that they all likely had different fathers.” –Syrairc
13.
“Found out my grandma had a baby as a teenager And was forced to give him up for adoption by my great grandparents. 40 years later he found us.” –dont-take-my-soup
14.
“My sister cheated on her husband throughout her entire marriage to the point that all three of her kids have different biological fathers.” –jensyfrenzy
15.
“My mom and older brother are not biologically related to me. My bio mom died sometime after I was born, leaving me, my sister, and my dad behind. My brother was the one that told me. My parents never told me because they wanted to protect me from the truth, but my brother thought that was a bs reason for me to not know. I don’t know if my parents know that I know the truth, but I don’t want to bring it up either.” –ItsGoT1me
16.
“Found out my uncle is actually my brother, my mom had him when she was so young that my grandparents raised him.” –Picklesgal111
17.
“My dad fathered a child in high school. His side of the family knew, and my mom. We found out years after he died that we have a half-sister.” –2leewhohot
18.
“After my mom died I found out the real story behind my parent’s marriage. She came to my father’s country to visit some of her relatives. Met my father and after just one week she asked him to marry her so she could stay in the country. My father accepted because he had no one else and his parents were pressing him to get married already.” –Amendris
19.
“My uncle served in Vietnam. While over there his troop found a baby that had been orphaned or abandoned, they aren’t sure. My uncle was shipping back to Australia soon and wanted to adopt him, but my aunt said no (they’d only been married about 4 months when he was drafted, so while I don’t agree with my aunt’s actions and generally don’t like her as a person, I can understand why she said no). My uncle’s troop found a family to raise the baby, and that’s the story the whole family knows. The secret is that my uncle and some other guys from his troop stayed in contact with the family and the kid, sending them money every month to help raise him and then to help him go to university and eventually helped him and his adoptive family move to Australia in the last 90s. My aunt and the rest of my family had no idea all this time, it only came out when my aunt and uncle divorced in 2017 and she had a forensic accountant go through their bank records. She worked at a bank for like 40 years and always noticed the money missing, but his reasons were always justified. Since we all know now, my uncle has introduced some of us to the guy and his family. They’re all really lovely people.” –Aetra
20.
“My defacto uncle (he and my aunt never married but have been together since well before I was born, with a few hiccups) has a child with another woman. It became common knowledge when the girl was 6 and was starting to understand the situation.” –tahituatara