Thanks for the translation!
One of the aspects of manga (art in general, but I feel like I bump up against it especially often in manga/anime) that I have the hardest time suspending my disbelief for is the passage of time. The chapter was sweet, it was nice to see them confirm their intentions, do shit together, talk about important things; all that good stuff.
I have a hard time believing that her mother passing away two years ago wouldn't have come up a lot sooner considering the amount of time they spend together for as long as they've been spending time together. She would've referenced that at some point.