Not a doctor/nurse, but my (ex)girlfriend delivered a baby while I was in the delivery room, and turns out it wasn't mine.
She was 16, I was 15. All along I was under the impression that this kid was mine, and time to be an adult. Took all the classes, read the books, worked every night/weekend to save whatever money I could as a 15 year old. I finally get the call she is in labor, so I have somebody rush me to the ER. Luckily for her, it wasn't a long labor, only about 6 hours, but their was a complication. The baby came out with the umbilical cord wrapped around its neck. Doctor assured us it was going to be OK, but the nurses were prepping for things to go south.
Baby comes out, its a light shade of purple, and the nurses immediately take the baby and put on the smallest mask you have ever saw, to help it get oxygen I guess. I was too panicked to ask a lot of questions. They state they need to keep the baby on watch overnight, so I stay in the room with the ex.
The next evening, baby is back in the room with us, and all seems well. The Ex is asleep, and the same nurse from the night before comes into the room, and beckons me out. She states that at risk of her losing her job, she has to break some harsh news to me, that kid is not mine. She stated that while at this stage it wasn't obvious, over the next few weeks it would become clear this kid was mixed, and since both of us were white, it was a high probability that it wasn't mine.
Queue a mixed bag of emotions, and me promptly waking the ex to get a little clarification. Come to find out, she knew the chances, and was just hoping it was mine because it worked better for her. Apparently her father was old school racist and she didn't want to have to deal with that. I left the hospital to collect my thoughts, and a few weeks later was served with child support papers. One DNA test and about 6 weeks later, I am 0.0% that kids father.
Where ever that nurse is now, I hope your life is amazing. I understand that you were not supposed to get involved in the personal side of things, and keep it professional, but you saved me a lot of additional headache.