Maple didn't take things the wrong way, even when she probably should have. Or maybe more accurately, she wasn't bothered by passive-aggressive sniping--- or she ignored it, really. That was the most accurate way to put it.
She knew it was there, but she wasn't going to respond to it, because it wasn't worth it. If you had a problem with her, you could say it directly, to her face, or stew on it for the rest of your life. It didn't make much difference to her.