Should I continue to buy things for such a mother-in-law

Although I often browse in the mother-in-law version, in fact, my relationship with my mother-in-law is also very subtle. Speaking of mother-in-law, I am really depressed. Let's talk about buying things for my mother-in-law today. Several years ago, I bought her clothes for the first time. I saw that they were beautiful, so I bought her a short-sleeved coat. Without her husband's knowledge, I thought she would be happy if I took it home. As a result, she didn't say a word I told her to try it on. She said it was so big before trying it on. How is it possible to wear it? I can't see any happiness. As a result, my father-in-law tried it on and said it fit. But I have never heard a good word. After that, I also bought some clothes for her, because I was far from home, so I didn't buy many clothes for my mother. Thinking that my mother-in-law has only two sons and no daughter, every time I go shopping with my husband, I offer to buy my mother-in-law beautiful clothes. I can see that my husband is happy to do so, but to be honest, I can't buy more than five clothes for her. She can't say anything happy when she gets one. She always says she's too happy as soon as she gets it. Two days before the Mid-Autumn Festival, my husband and I went shopping and saw a pair of slippers. My husband offered to buy a pair for my mother-in-law, because all the slippers her mother-in-law used to wear were cheap plastic slippers. My husband and I tried on this pair of shoes, which were very soft and comfortable, thinking that my mother-in-law would be very happy. After taking them home, my husband specifically said; Mom, these are slippers that XX bought for you, but they are soft and comfortable. As a result, my mother-in-law said that she was so old that she could wear shoes as soon as she got them, without stretching her feet. Husband says it can't be big. Just try it. As a result, my mother-in-law tried her foot just right, but she still said it was too big. I hope it's a smaller size. I can't help but say, can you wear a smaller size? She was silent, and then I stopped eating, alas. . . Maybe people will think I'm a good person, so don't buy it for her.