[Sirantha]

Mty first impression was that she was very nice and kind. :3
But now I thinkn that she just married my brother for his money... Which he doesn't hae a lot, but he has more than her.

You may just have to look at the reason that she did it.
There are many reasons that people get married without telling anyone until the last minute.
It could have been out of fear that family would not accept her decision, or simply that she wanted the affair to be a bit more private.
But I'm sure it wasn't to hurt you.