When Reimu hears about Marisa being a child, she must’ve multiple thoughts, not only about how if she herself has a family, but for how much longer until Marisa will have one.
I'm gonna offer apologizes for everyone here that I'm become broken record and saying the same sentences over and over again: "THEY....SHOULD....LIVING....TOGETHER.....!!!" it's already very clear from the story so far that they are really struggling and suffering to living alone. and yet, they never think to lives together and helping each other if they have hard times? and I think I'll never stop saying those sentences going forward.....