Ashok, shagun ???

I have missed some past episodes
But why does Ashok hate Raman what's the story behind them.
How did he get shagun to be his mistress or whatever does he even love her And i heard someone mention that Ashok cheats on shagun all the time

And do they have a son together

Ashok stole Raman's wife right from under his nose
Shagun wanted money and a big house and left Raman for Ashok
Ashok was Raman's boss
Raman vowed revenge and hates Ashok
Ashok being the cocky man he is, is going after Raman so he can prove to Shagun he is the better man

Shagun is Ashok's trophy gf and keeps promising to marry her..but it seems he is leading her on

Raman and Shagun have a son and a daughter together

Yep,raman n sagun have two kids ruhi n aditya ,