Why are you giving them your money in first place if they're doing ok on their own already?If they have never asked why would you 'help them financially', why would you 'think they needed it'?? Clearly they didnt, and took it anyway- now either your DiL is as greedy about money as her brother is, or shes been bank rolling him all along? But yes why arent his OWN parents bailing the son out then? (Unless as i said, his sisters always done that, with money 'spare' from you before?) Why should anyone else bail out this spendthrift brother of your DiL? He will never learn if they do so? I would have stern words with my son, ask why he feels he has to do so? Ask what he&your DiL will do for money if they give it away now, then they ever need it? Tell him you won't be doling him out any more unneeded cash.Nobody knows whats going to happen in our fragile future in UK and if theres more covid waves there will be more financial strains/losses, job losses, business closures perhaps- who knows if your son& DiL will need their money themselves then- why are giving it away now to someone who is clearly living beyond their means?? The DiL's family sound a greedy, grasping lot to me who think theyre better than others, when they are doing it at others expence, including your DiL! Dont give them any more of your cash, no matter what they decide about her brother.