I'm not, you are

Li Lanni did not force Xia Luna to speak up. However, this matter concerned her too; and if Li Lanni knew what was going on, she would be on the look out and would not fall prey for whatever Li Xiyan was surely going to do once she knew Li Lanni's whereabouts. 

"Have I told you about my… our stepmother?" She asked.

"No." Li Lanni shook her head. Forget the stepmother. Xia Luna had not told her much about herself. Li Lanni had numerous questions to ask, but this was not the right time to ask them so she could only let Xia Luna speak about the details she was comfortable divulging. 

For the whole matter to make sense, Xia Luna briefly explained everything from where it started, as explained to her by her paternal aunt.