I’m a bit confused by this post. Am I correct in thinking that the DD needed to have £1400 in order to enter into a flat share with her boyfriend? And that the OP had promised to put £500 towards this deposit? In which case she was only £100 short of the amount agreed. The DD probably thinks she has done really well saving this money ! I expect this is why she is annoyed ( and has been rude ) to her DM. AT 23 years of age, in a relationship, no responsibilities, they have certainly been having a good time before ‘ settling down ‘. I definitely think the DM should have charged a more realistic rent, but that option has passed now. Please give the £500 you promised, as I think DD did keep her side of the bargain. It was just way too low an amount.They are about to experience ‘ real life ‘ with rent and bills to pay very soon. I’m sure they will have discussed budgeting and if they haven’t, they very soon will! I also suspect they won’t want to hear too much advice either ! I hope it goes well for all concerned, at the very least you will have your home back !