S1·E34 Shock! Ryo's a Papa Don't Wake that Sleeping Child

A young girl comes up to Ryo claiming that he is her father. But this is all a ruse by a desperate mother to protect her from her late husband's father who intends to take her away from her mother. Ryo and Kaori both develop a bond with a little girl and Ryo realizes that the late husband's father is not as bad as portrayed.