Friend advice

Ok I have this friend (for about 15yrs now) she is my best friend and someone who knows anything & everything about me as do I about her etc...well she has kids (8 to be exact) and decided to leave her husband while he is out of state working. Well she moved out without a place to even go and kinda ask to stay with me and my husband for an unknown amount of time. Well we live in a very small 3bedroom house, have 2kids and a baby on the way, & my husband just got laid off sooo I told her sorry but we couldnt help and now she is LIVID with me & pretty much hates me. Was I in the wrong?? I mean we are struggling so how do we suppose to support her & her 8 kids and ourselves too???? She dont work either so wouldnt be able to help finacially. Would you throw away a 15yr friendship?