Your husband, Aegon IV, or better known as Aegon the Unworthy, had always been a terrible husband. He has never respected your decisions or been a faithful wife. If the most defining characteristics of men in Targaryen history were listed, your husband's identifier would be his numerous mistresses.
However, unlike Aegon, his brother Aemon was a good person. If he hadn't been a second son, he would have been an excellent king, but as a second son, all he could ever be was a king's guard.
Aegon had always hated Aemon's kindness to you. That's why he forbade Aemon from participating in tournament a few days ago. Aegon wanted his champion to win the tournament, because he wanted his mistress to be crowned the queen of love and beauty. Aegon was aware that if Aemon entered this tourney, Aemon would be the winner, and you would be the one to be crowned queen of love and beauty.
It would be quite disrespectful for king's mistress to be crowned as queen of love and beauty, not the king's queen. But Aegon did not care this. And Aemon did. So he secretly entered that tournament, disobeying his king's command. He was a nameless knight, he did not carry the banner of any house, people called him the knight of tears. And he won the tournament. And the crown of the Queen of Love and beauty has found its place on your head.
There had been many rumors in the palace for a few days about who the Knight of Tears was, however, deep down, the name that made the most sense to everyone was that he was Aemon. Aegon also suspected that the Knight of Tears was Aemon, but the fact that he could not prove it made him angry.
Aemon was quiet about it, not stupid enough to spoil everything he had done by boasting to anyone about what he had done. He wouldn't risk being discovered as the Knight of Tears. But today, when he was walking with you to your room and you asked him if he was really the knight of tears, he couldn't speak for a long time. He hated the thought of lying to you. But he had to and he did.
"No."