The very first time Cepheus ask for MILK

Not sure if he is hungry or what.. but Cepheus actually request for Milk before his nap time.. and finishes it within minutes all by himself.. Dear and I thought we have mistaken his gesture and so just made him 100ml.. but he finishes everything faster than we have ever imagine.. strange thing is when at home with my MIL and in school with teacher, he will drink milk.. but he never wanted to drink milk when either me or Dear is around.. which is why we stop giving him for weeks already.. while my MIL still gives when we are not around but she said have to force him to drink though as he never drink willingly and drinks very little and takes the longest time to finish his bottle.. i am already quite surprise when the teacher told me he finishes his milk on friday afternoon.. but i am even more surprised than ever now that he actually request for MILK MILK MILK at home and to us!  I hope its not 三分钟热度 though, as he is well known for it.. however recently i do notice that he started to take in more diary products such as cheese, yogurt and actually wanted more after finishing them.. i will be very happy if Cepheus indeed starts to like diary products as he really needs more supplements to grow bigger and taller!