Pop is the one who likes Songpeep, willing to do anything for Songpeep. While Songpeep only likes the Doctor. The dad prefers Songpeep because she always act like good daughter. She follow or do whatever her dad ask her to do even though she don't like it. ie like follow him to meet up with the doctors at the railway station. So, Songpeep always act nice and good daughter to the father so he thinks she is a good daughter. Dad don't like Gasalong because she "kills" his unborn son/daughter. The earlier episode where his mistress having miscarriage because of the food that Gasalong prepared.
Actually, it was songpeep and the maid who put something in the food.
I am guessing all this because I am not Thai.
Am interested to know how Gasalong died and why she did not get to rebirth like Songpeep as Primpy. I am guessing that Gasalong did not die after the rape incident (earlier episode) so I am guessing that Songpeep probably put acid to her face and murder her and maybe some evil things to make sure Gasalong dont' ever get reborn,