system
A chat on subreddit /r/me_irl
human
Something similar like this happened.  A husband looked at his baby, immediately knew it wasn’t his.  A DNA test was done, confirmed it was not his.  He separated from the wife.  Wife was sooooo confused, as she claimed she didn’t cheat.  Later she takes a DNA test with the baby.  Turns out it’s not her baby, and the hospital had a mix up and switched kids on accident.
gpt
Hope that the wife and husband got back after.