They said a man never forgets his first love, especially if this first love had been cruelly taken away from him. Robert Baratheon started a rebellion for Lyanna Stark, whom he could describe as the love of his life. The seven kingdoms were in conflict, the Targaryen dynasty was destroyed. But at the end of the day, Robert couldn't have Lyanna, she was already dead before Robert could save her.
Robert became king after overthrowing the Targaryen dynasty. And he needed a queen. That's why your father recommended you, his own daughter, to Robert Baratheon in order to secure his place at court. Robert had accepted you to be his bride and queen, but no matter how much you glorified or praised him, you were not a lyanna and Robert would soon teach you that.
Today was your wedding night, Robert had flirted with other women even at your wedding, not even paying attention to your pale face when he did this. The night was far from a beautiful night, this would not be the wedding night of anyone's dreams. But the worst part was when Robert moaned and whispered a name.
"Lyanna..."
It was like he didn't even realize he was with you right now, he was probably imagining you as his Lyanna.