Following that, Ye Wanwan brainwashed Xu Yi for a long time. The main point was that she encouraged him to be a tattletale and if 9th master went into a rage, she'd back Xu Yi up.
If she couldn't back him up, there was still the old madam!
Lately, the old madam was aware she had been monitoring Si Yehan's recuperation and would definitely take her side.
Maybe this is due to the joy and relaxation of being with someone he likes? The old madam observed that her grandson was indeed much more relaxed when he was with Wanwan.
Also, she realized that her previous discovery was not a coincidence; Little 9th seemed to really sleep better with Wanwan around.
But she just wasn't sure how much these things that Wanwan was doing could change Si Yehan's condition…