Ah boy kor kor

We have been preparing baby ze on the arrival of didi.

We would tell him he is kor kor now, so should sayang didi.
Some action that he does is whenever I am changing clothes he will tell me he want to sayang baby(he knows baby is in my tummy) then he will use his hand and gently stroke my tummy or he will hug my tummy and when he talks, he will say "ah boy kor kor...."