So my sil has just bought a house, totally over stretched herself. She has always laughed at 'swotty people' and tells me my son is treated badly because I buy him 'boring books' despite her terrible behaviour in school netting her a really crap job. Really cool. Her boyfriend is the same. So there they are, sitting in this house they can ill afford, buying the most expensive gadgets, the best baby gear for their kid etc, and as soon as they run into financial trouble come running to my soft touch of a husband to borrow cash to pay for their water leak and their broken alarm. Now we're in the midst of a mortgage application and need to show evidence of hard unbroken savings, plus we have exhorbitant rent to pay, we have a child and another on the way plus all our other monthly outgoings. But because we're responsible, have good jobs, my husband's whole family see us as loaded. They all think nothing of going out and spending hundreds of pounds on booze, they are BIG drinkers. So, aibu to tell my husband not to lend his 29 year old sister money for her responsibilities, or am I a mean cow?