You think Max and Chloe ended up having kids after Reunion? I can see them being great parents.
My personal headcanon is "No," but I'm so sorry I did go rouge on this question and ended up answering it for every LIS pairing because I was really interesting in exploring this question.
Max/Chloe - Neither Max or Chloe is particularly interested in having kids. They never discuss it formally, but they don't need to because they've known each other for so long and so well. They do have a few house plants, which Max always kills, then a cat, which Max DOESN'T kill, and along the way they end up taking a few young ones under their wing. They meet Cauledon students who look up to Max greatly, and they meet young punks on the road who are really inspired by Chloe's story. So they do take in mentees, but never end up having any kids of their own.
(This one isn't Grahmfield. More of how I interpret the characters) Max/Warren - Warren wants kids. Max doesn't. Warren is convinced she'll change her mind and when she doesn't they have a messy then mutual breakup in their late twenties as they realize they want very different things.
Rachel/Chloe - I feel like Rachel is the type of person who's good with kids but doesn't really like them. Like, she helps a parent stop a kids tantrum in the middle of the grocery store and then turns to Chloe and is like "What a brat. Reminds me of me at that age." She doesn't hate them or anything, she just finds them kind of annoying and would never want to be tied down like that. Then teenage Chloe gets overwhelmed by kids easy and is in constant "What do I do?" mode if anyone younger than her shows up, and she still wants to road trip forever with Rachel which would make having kids hard....so yeah, no kids for them.
Sean/Finn - I feel like they'd take on Mentee's pretty often, but no actual kids. They just find people who resonate with themselves and try to help them if they're having a hard time, and sometimes that includes young adults who really look up to these two guys who have made a good life for themselves despite the hardship they faced. I especially think Sean would be eager to help younger people get their lives together simply because he misses Daniel. (Assuming this is on the Parting Ways ending.)
Sean/Cassidy - Maaaaayyyyybbbbbbeeeeee they'd have kids. I'm pretty torn on this one because on one hand Cassidy likes her freedom and Sean had to be Daniel's parent for so long that he might not want that in adulthood, but also I could see Cassidy maybe wanting to have a family again and Sean being open to being parent just because of how much he loves Daniel. I think IF they had kids, it would be a solid decade after their Parting Ways epilogue and the baby would probably be "unexpected but not unloved." I could also just see them taking in mentee's though.
Alex/Steph - I don't think they'd have kids anytime soon after the game ends, but I could totally see them having kids in like a decade or so. I feel like they're girl Mom's who really encourage their kids creatively. Then when their child turns 18 and moves out for college they go on the road again for some more touring/sightseeing. (And take a lot of family trips in the mean time.) (I also think Steph would think that she didn't want kids, then she'd see Alex interact with a child and be like....."Damn. Maybe I do what want want kids if it's with Alex.")
Alex/Ryan - I could see Alex wanting kids but being a little unsure about them just because of her unstable childhood home life. Then I feel like Ryan could go either way with having kids. Like, he would maybe like to have them one day, but also if he met the perfect women and she didn't want kids he would accept that. I could see him and Alex having a kid after the game though. I feel like on the road Alex and Ryan would have a kid in a decade, while stay in Haven Alex and Ryan might have a kid a little sooner than that, but not by a lot because they both need a lot of time to work through everything that happened in the game + Alex's trauma. I feel like Ryan is a dorky and slightly overprotective Dad, (Scared of what happened to Gabe happening again) while Alex encourages their child to have a lot of freedom of self and creativity.
Max/Vinh - Both of them take great measures to make sure a kid doesn't happen.
(This one isn't cute Max/Amanda. More of how I interpret the characters) Max/Amanda - I feel like Amanda would be at least hypothetically open to having kids someday, and Max wouldn't, and that would surprise her a lot because she just kind of assumed that a professor would maybe be open to having kids in the future. I feel like this would kind add a lot of weight on their shoulders because Amanda would feel very unsure about kids being off the table for her.