Honestly, sounds like YOU have the problem here. Seriously, even if you're right, and she IS an ogre... your brother is the one with her, not you. And, really, who are you to judge? If he's happy, then good for him. If he's not, well, you don't need to worry, do you?
And, one of my (now VERY ex) girlfriends tried to make out with my sister... *shudder*. So, count yourself lucky... *shudder*
