Maybe she doesn't want a relationship either and just wants some boy toy
If you want it, go with it.. just remember those prenups..
How old is your brother? If he's a teenager like me, then he's probably done something worthy of a tongue lashing. I hate moments where the house is up in a shitstorm where your whole family is involved in yelling. It sucks when you've done nothing but people are mad at you just because of one person.
Growing up in an Asian household, I have learned to fear the inevitable wrath of my parents daily. If I didn't call, I might as well commit seppuku or something.