Please don't mix up. Seeta is not a triangle love affair or matter of runaway story like Helen of Troy. Seeta is a classic case of virtue and killing of the evil for violating / trying to damage the virtue of a women. Who is maithili, anyway? I don't know this name. I thought Mythili is the name of Seeta.
And this is a case of adultery by the women using both the men discretely. To top it all she was an actress too. A good actress in real life indeed.