1. Rachel and Finn got married.
2. Rachel had a daughter named Starr.
3. Starr was not Finn's daughter, but Jesse St. James' daughter.
4. He knew that she wasn't his, but was still raising her.
This isn't a whole lot to go on, because this was just a tiny blip in the story, but it is bothering the crap out of me and I would like to find it.