My MIL treats my SIL's son like a GEM. Everything is about him. My other SIL also feel that her own mum is biased. Every time we have family gathering, with all the grandchildren around, the boy gets special attention. Even though she say she is shifting in with us (we have a room well furnished for her), but she only sleepover for 1-2nights/week. Most of the time she sleep at my SIL place with the GEM. I feel that the room for her in my house is 'under-utilised'. I could have converted it into a playroom for my kids. And sometimes when she comes over, she brought the GEM to sleepover too. I don't feel good, kinda feel privacy intruded. Am I normal to feel this way?