I have serious concerns about my MIL. I recently found out she has taken out a huge loan, but has always been a spendaholic and continues to live far beyond her means. She has never worked and her mortgage has been paid off by her EX-husband (after they divorced), but she spends crazy, like a good salary’s worth on her hair/nails/personal training/ massages etc every single month, has recently done significant (and completely unnecessary building work to her house). I have been with my wife for many years now and not once has my MIL ever put her hand in her pocket to even offer to pay when we have gone out to eat, although she brunches with her friends very regularly. The last straw for me was when for Christmas we went to see a show and then dinner after, which my DW and I paid for. Not only did she not even say thank you, but she made a couple of remarks that it wasn’t a show at a big West End theatre. Totally ungrateful and I want my DW to sit her down and get her to be realistic about her income vs outgoings. I have even offered to my DW I would do this but she said not to mention it. It’s unlikely her income from property covers her outgoings, and I am worried she’s digging a huge hole that eventually my DW and her siblings, and her ex will end up covering, and maybe she’s even possibly got this as her plan B. The rest of us work full time and live within our means, but could not possibly pay back this level of debt. AIBU? What can I do?