a phone call home

I was filling out FA application, and needed to verify some information. I called home and dad picked up. I quickly verified the information. Since I call home every night, I told dad that I will call later at night as usual instead of talking now. When I was about to hang up, I heard my mum's sad voice: Why didn't he talk to me? That sadness, even thousands of miles away, I can feel it clearly. I know, that is my mum's love--even though I call her everyday, she couldn't get enough of it. My life might get very busy in the future, but I know I will keep the routine of calling home.