Thanks for your comments! I did not intervene. You guessed wrong Yuk Lum. The only family activity that we all engage in is dinner, so that suggestion didn’t work out too well. As for Gwen, your suggestion for my brother to please my Mum worked. My brother has tried to spread his time equally during the weekends by spending more time at home with my Mum. My brother’s girlfriend still comes by, although less often, and does not stay too long or too late nowadays. His girlfriend is rather smart too, buying a handheld Sudoku game for my Mum, who spends all her time on it. This has worked out fine, and my Mum is now talking to them again. I guess the Sudoku game did the trick. Haha!