Originally posted by: LoveInAutumn26
To add more to that...
The lines might have started to blurr in her mind, but I still think she would have had a hard time truly accepting him as her father (not because of anything HS did). She is way too attached to her Khuranas side of the family. Maybe she feels it’s like betraying her paternal family. Khoon ka rishta is indeed bigger than Dil ke rishtey... sighh 
Ashok will be a horrible father to her. She might not even accept his apology for his behavior. But the fact remains he is still her father in her eyes, no matter what he did.
Once a I had wished she would tell Ashok in his face you are just my sperm donor but my actual father in the true sense is Hanuman Uncle urf my Papa, or Pops, or Babu whatever she would have called him. 
You know what Ekta’s show YHM portrayed how step parent can be more than a biological parent in a much much better way. Similarly to Ashok, even Shagun abandoned Ruhi and left her. Ishita came and filled that void in Ruhi’s life and became her mother in every sense. Ruhi never ever saw Shagun as her mother after Ishita. Her mom was always Ishima and not Shagun mama. She defended Ishita in front of Shagun numerous number of time and even Ishita proved that she is Ruhi’s true mother in every sense.