Almost unberable

Back home, my brother's home, for less than 24hrs, and it's beginning to be almost unbearable. Is it because I'm using his water, his kitchen, sleeping in his (spare) bedroom, or the fact that I'm using his electricity? Or is it because I'm petting his cat, or am I in his way?

Bad enough that I feel this way in the same home (though much renovated) that I grew up in... imagine what it must be like for mum, who bought this place years ago with dad... imagine how disappointed she must feel being here, and feeling so uncomfortable and unwelcome.

Mum had originally wanted to stay till the end of the month, but it seems like she might change her plans. I will leave if she does...