I'm sorry m cracker but I still need some more info....

I assume your brother is slim and has a beard? But she is getting used to him?

Why does she go to the bathroom to pee? Is that where she is usually? Does she run to the bathroom? Is the bathroom the only room with linoleum on the floor? Does she pee when you come back from being out?

When she hears other dogs and runs is it when she is outside or inside? Do her ears fall back against her head or prick forward? Is she turning her head away from or towards the sound?

It is very difficult to be specific without actually seeing the behaviour of the animal myself so as much info as possible is invaluable. If you can describe some things that have happened that have concerned you that would help along with as much detail as you can remember. Thanks.