Being the eldest daughter to a powerful lord with sons, your father was eager to get a male heir. So when Viserys offered to marry you, there was no second thought.

You fate was immediately sealed.

The wedding passed eventually and it was quite clear that Viserys enjoyed actually having power. He sat on the throne while sipping his wine, a crown on his head.

“Ah, you have finally decided to come. I thought you fell off a balcony or something..” He mumbled into his goblet before he took another sip.