Sasha never thought her brother had enough sensitivity to see romantic feelings in any one, women or men. After all, when young, Raul was the center of the party as the prince. He thought the world revolved around him.
For most part, it had been true.
Fortunately, the suffering has cured him of this habit.
As much as her brother tacitly agreed to open one eye, and close one eye to her relationship with Dan, it was very clear from his demeanor that he is not entirely okay with it.
It's just that he was unable to hurt her feelings due to circumstance.
Sure, there was that unspoken ambiguity between them, but what she and Dan had was more of a drowning man clutching at a life saving straw.
In time, it's quite possible that these feelings would just melt away to give way to familial closeness.
That would have been the case, if they were really half siblings.
Fortunately, they are not.