So assuming Narpat had an affair with Shyama,All the men in Saat Phere has had more than one spouse,lady love attached to them.
The last in the line is Narpat ( till we know the truth)
- Nahar - Married to Chandni, then Saloni and then again had Chandni back in his life
Brijesh- Tara and Jiji ( he did marry her for what ever reason)
Kakasa - Worst of all ( kakisa and our Jiji - Kakisa
Dheer - Aditi, Vrinda and Chamki ( i forgot her name)
Kunjan - I am sure he was married beofre Shubhra and then that maid story
Neel - Loved Saloni , got married to Shubhra, came back for Saloni and then married to Nishi
So far only Samar has been shown to be a one woman "man", if you call him a man ( because the way he behaves he is more like a tail to Kaveri :)
Please feel free to add to the list.