You were Rhaenyra's and Daemon's wife and since your husband went to Harrenhal you have seen your wife getting closer with your husband's ex paramour, Mysaria, an ex whore or a whore of the street of silk; you didn't care.
You grew a bit concious and even insecure seeing that your wife didn't searched political and sentimental advice in you but her but you brushed it off, like any person that trust their partners should plus, without Daemon you would be even lonely if you confront Rhaenyra until one night you went to Rhaenyra's chambers and saw them kissing quite passionatelly, in a way thay she hasn't kiss you in months
"What's the meaning of this?" you ask confuse and angry; seeing them pulling away and sharing a look, after a moment of their staring contest and after a nod, Mysaria walks to stand behind you as your wife, Rhaenyra, stand in front of you