My husband remarried and had a son named Masashi, who is about my age. I was worried about this before we decided to get married, but after we got married, Masashi was kind to me and we built a happy home with a good relationship between the three of us. Then, my husband and I had a baby recently. Masashi was happy to have a little brother who was much younger than me. But one day, while I was breastfeeding the baby, I noticed Masashi looking at me with glaring eyes. He seemed different than usual, so I asked him what was wrong...