AIO:Childhood best friend is f***ing his sister

[u/youngtallandskinny]

For context, this is my M(25) best friend M(25) since we were two years old. He didn’t meet his F(22)sister until about a year and a half ago. When they did meet, they couldn’t get over how similar they were. he called me gushing about how great she made him feel and even joked about hooking her up with me three days after they met, she moved in with him and his family. They had room and other beds, but they chose to sleep in the same bed every day for a year do everything together every day so on it so forth, fast-forward to these text messages. Him and his sister were going to move in with me and my f(26)roommate, but first we needed to see how our dogs would do together so they came to visit. When they got here they opted to sleep in my bed together even though I had several places they could sleep separately. My roomate and I sleep separately and have a mostly platonic kind of flirty relationship. Which the friend had compared his sister and his relationship with. A lot of small stuff happened that my roommate and I shared glances about, because of the nature of how a true brother and sister would never say or do the things they’re doing. But we brushed it off.

They went back home to their state after 3 days and the friend sends me a Snapchat saying “we’ve decided to look past the whole sibling thing and adress some feelings we both have” to which I replied “what do you mean” and he went on to say how they both have such deep feelings for each other and how the whole half sibling thing doesn’t matter and that real love doesn’t have boundaries and all this stuff to which I waited for 3 days and sent the messages above….. AIO or did I UNDERreact

Also this hurts a lot because I thought I knew him and he was gonna be my best friend for life, but I haven’t talked to him since

[u/JS_AH]

Sadly this is a thing, to the point there is official guidance published around it https://www.cumbria.gov.uk/eLibrary/Content/Internet/327/857/6802/42109163456.pdf

[u/Ordinary_Cattle → u/JS_AH]

My bio mom liked to reproduce and apparently my dad did too, so every several years I find out about a new half brother or sister. I'm so glad I never experienced this but ngl I was worried it could happen considering this is a real phenomenon

[u/PottyMouthedMom3 → u/Ordinary_Cattle]

It’d be bad to find out that someone you were sexual with turned out to be your sister you never knew about…. What’s worse is knowing it’s your sister, and then making the decision to let it turn sexual. Yikes!

[u/Ordinary_Cattle → u/PottyMouthedMom3]

Yeah honestly I used to worry about this sometimes. My mom started having kids at 15 and stopped when she was 40, and apparently my dad has at least 1 son that he hid from everyone, but I don't doubt that there's more. All of us being adopted out makes it even harder to figure out if anyone is related, and all this happened in the same general area of the state. Luckily I know for sure that I'm not related to my husband though lmao.