Stupid me. I forgot to bookmark this fic and now I really want to read it, so hope you all can help. It's actually a series of fics, collectively called, I believe, the Ben!verse. Kurt I think had been in a relationship with Sam or possibly Evan(?) who died (I think he was ill) either before or shortly after their son Ben was born. Kurt starts a relationship with Puck not long after his husband dies and he feels a lingering sense of guilt for that fact. At the time in which the story is written Ben is still a toddler, aged 2, maybe less, so it's a post-mpreg fic.
Clearly, I don't remember much, but I do remember that it was well written. I don't think there was ever a conclusion to the series. I'd be ever so grateful if someone could help me find this story.
Mods: This is my first time posting in this community. I've read all the rules, but if I've gotten anything wrong please let me know and I'll fix it ASAP. Thanks!