My mother in law moved in with us unexpectedly last January. She had a stroke 13 years ago, and is confined to a wheelchair. She came with nothing but the rags on her back. She had no money, as brother in law stole it from her. My husband had to take money from his 401K so that we could build an extension onto our house for her with a huge handicap restroom. She receives social security and a very small pension altogether not much at all. I have control of her money. She wants me to buy her an anti inflammatory drink that costs $150 a month! I did this for a couple of months out of guilt, because in her previous home, she was very neglected. We try and give her whatever she wants. I finally convinced her that this drink was having a placebo affect on her and that it was all in her mind. Well, now it's been a couple of months later, and she wants me to buy it again for her - she's very adamant about having it. It really angers me! I've told her if she has inflammation, then we need to tell the dr. about it - she doesn't want to hear this. This is a huge waste of money that she doesn't have. Her money is being used to pay back my husband's 401K, as well as her diapers, and everything else she uses monthly. How do I say no to her without feeling guilty?