My sister has been with her partner for nearly 20 years and they live in a small terraced house owned by him. Her name is not on the deeds. She has a grown up ds and they have a dd (14) together. From the outside, they do not have an elaborate lifestyle. They never eat out, no holidays, one car, don't spend on the house, modest clothes etc, and they both work (him full, and her part-time). For some time now she has asked me to help them out when they've been short at the end of the month, and up until lock down hit, she always paid me back after payday. They were both furloughed and since March they've borrowed £500 from me, which hasn't been paid back (due to 'not earning full wages'). Today, I received a message from her asking me to lend her more money, which in itself, isn't a problem as I've always been glad, and fortunate enough, to help. Last October she told me they were in substantial debt and '£20 grand should clear it'. Now they're already an extra £500 in debt to me and I'm really worried for her. Her DP is a gambler and I've no idea if the debt is theirs or just his through the gambling...... or there may be something else happening as I just don't understand how two working people with an un-extravagant lifestyle could continue to run up massive debts like this. Her DP isn't very nice to her and they argue often. Our mum died recently and I'm sorting out the estate. Once her house is sold there may be about 20K or so coming to my sister. She doesn't know this yet, but she does keep asking me how things are going with 'mums stuff'. I'm not sure about telling her as it may or may not help regarding her current and any future debt. So, what I'm asking is AIBU to ask her about the debt? (seeing as I'm lending the money), do I lend as usual and just keep quiet? (as its none of my business), or do I say, no, sorry, not this time? I'm worried that the money she inherits from mum will go straight into paying off his debts and think that she may be better using it to leave him and set herself up on her own...... I'm sorry to anyone in this situation and I am conscious that I don't want to come across as judgemental in any way to my sister but I am worried about her.