Catherine of course claimed, possibly accurately, that she had never actually been married to Arthur, as the marriage had not been consummated.
She was certainly the most attractive personality of all those involved in “the king’s great matter.”
It’s possible that it wasn’t consummated. Arthur made dopey jokes about consummation the day after their marriage which makes me believe he was nervous about it. He was young. She was young. I think Isabella and Ferdinand were nuts to hand over that young girl into the Tudor fold. Creepy!