How can i deal with my brother and his wife?

I've just moved to a state where my brother's live to study for my master's degree..However, he is married but he asked me to stay with him in his house and i really appreciate this, but i decided to not stay with them for a long time in order to not bother them. during my second week living with them, he started to make problems with me and argue me for silly things...Unfortunately this happens every day and i'm felling that i can't take this anymore..I figured out that his wife is the one who is creating the problems. Now i have a problem that i can't move to another place because of some issues..Do you know any way that i can deal with them without having these problems?