My mum has never been very good with money but recently she and her husband sold their house and now have a few grand sitting in the bank. They're supposed to be putting it away for their retirement but they seem to just constantly spend spend spend ever since they sold the house. She bought a bath chair for £700, bought my sister an ipad and tonight she asked me what I wanted for christmas, I asked if she'd be willing to put £20 towards some ugg boots (this is roughly how much she normally spends on me at crimbo, between £20 to £50) and she said "oh no, I'll just buy you them - and stereo you saw if you want? " 
the boots are over £100.
I'm torn between REALLY wanting the boots and feeling guilty at the same time because I know she shouldn't be spending the retirement money but she's insisting. aibu to worry about their spending habits or should I let them get on with it??