It's a heck of a thing to explain as it is, nobody would believe but lying to a person who obviously senses something is not right... ehh...
Seems like grandmother being "rough" for Sakura paid off, albeit she could be more softer on the communication that made her wanting her dead, she can cook rather good it seems...
Miiko is kinda like Sakura, guess Makoto preference got influenced by her or can't let go of the past...