About 15 years ago I moved to a housing association property with my mum and sister - we were aged 17 and 15 so too young to go on the tenancy agreement. My sister moved overseas. Some years ago my mum remarried and moved out we are now NC. The flat is still in her name. I live here with DH and two children. We both work though low paid and don't claim HB or anything. We live in London and cannot afford to buy. The HA want to do an audit. Would they evict us as we are not the the legal tenants?