According to me, the problem in execution lies here: Virat's character is not shown gravitating toward any of the women while Sai is shown to atleast have residual feelings. Which is why Sai is getting flak.
In such a scenario, Pateralekha's concerns look more valid about her husband being drawn to his ex-wife.
Please note: I am keeping legality, bigamy and everything aside. I am only trying to dissect why the scenes are coming out uneasy for audience who love Sai
This one