True enough, the woman who followed behind Duan Yarong as they walked out was Mu Tingfeng's mother, Su Ruixin.
Ever since the last time Su Ruixin tagged along with Duan Yarong to pick up Joy, she had changed her lifestyle and came to the Zhao family daily. She called this an emotional interaction and communication with her grandson.
As such, Zhao Youlin was already so used to seeing Su Ruixin around at her house.
"Youlin, you're back! Just now, Joy was playing with Sparta inside the house. As soon as he heard the sound of a car engine, he immediately dashed out. Your mother and I thought something had happened. Little did we know that it was you coming back home." While Su Ruixin was speaking, she caressed Joy's small head adoringly and lovingly.
"Urm… Yes, Joy recognized my car engine…" Looking at Su Ruixin's smug face, the corners of Zhao Youlin's lips unwittingly twitched.
"Really? Joy is truly a clever boy."