It was forced tbh and that makes me mad because Gudrid is a good character :( the relationship could've been explored better, giving the fact that Thorfinn never was romantically involved with anyone and all his interpersonal relationships has impacted him on a high level. Heck, even Canute and Thorfinn had a better developed friendship. What happened there?
This is an unpopular opinion but I really hate thorfinn x gudrid. I felt like it was a bit..forced? I have never felt any tension when they are intimate or anything. Idk I felt like I would've continued reading Vinland saga if there weren't any romance that involves thorfinn