Seems like in KD, Shruti is another girl whose zimmedari he takes up, and when they stay in hotel, he tells everyone she is his wife, apne ghar leke jaata hain and eventually that female falls in love with him.
Imon will think he has an affair and will try to divorce him, coz he never clarifies and also it seems he skips the birth of his own daughter to be with shruti.
In Tamil, there is no Shruti track. Madhavi I think is Jagdaps sister, who falls in love with Virat after he loses memory. He forgets everyone incl his own family. But when Jagtap tries to marry Sai, he starts remembering her and then he fights everyone incl Jagtap to save her. Samrat, Virat and Mohit will rescue her together I think, not sure. Sai will confess to Virat that she loves him.
Everyone suggests they should remarry and they remarry again in GC in front of family and villagers.
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