Won't say backstabbing, but more outdated. Her memory of martial art are all pre-marriage, with most of it only regarding her family. She just got out of jail & have no way to keep up to date. I doubt "how to secret Martial art society" work well on Google/baidu/whichever site they use.
In more layman term, she turn to her family because it's the nearest source. It it doesn't work, she will have to find other. This just happened to be the first one. Doesn't help that no one talk & it turn physical right away.