Confusion ???

Who is Rastogi? Kya Vishual e Rastogi? Anyaway Kya Rahul Vishual ki Beta hai? Another question Kya Karan Vishual ki beta hai? I am confuse. Plz answer my question.

rastogi is the family name. vishal is rastogi. vishal is not rahul's biological father. karan is sagarz son!

sagar is kamini's brother. Kamini is the wife of Vishal and the mother of Rahul and Ramona. While Ramona's real father is Vishal, Rahul's real father is not Vishal.