She'd not be "sacrificing" her love if she felt that V was trustworthy. She didn't take Ps BS when they were in deal marriage and stepped up to make VP clarify what their relationship was. When shruti kaamd happened she exerted her wife haq even though everyone including V was mad at her. Post confession she was very vocal about not liking Ps interference at all but she gave V the BOD and tried to make things work despite illegal surrogacy and all. But now if despite her residual feelings, inability to hate him and move on- if shes not happy about his confession but more interested in keeping Vinu's family with VP intact- thats because she does NOT trust him. If she did, she'd reconcile and use the opportunity to tell V to make the stance clear to Vinu that she is the aai, not P. She'd tell him to make P exit for good and go back. But she doesn't see the value in that even for the sake of kids. That speaks to the fact that she does NOT trust him. If she did, she'd never care about what P felt/not. P guilting her, manipulating her would be immaterial because if she loves V and V loves her and wants to divorce P, then thats it. P can create a tantrum and it wouldn't matter. But Sai doesn't feel the need to step up and haq jataofu because she doesn't trust V. She knows what its like to be his wife and see him swing like a pendulum and prioritize another. He did it to Sai with P and now he's doing it to P . Sai has seen Ps obsessive "love" for V since day 1. So she even feels pity sometimes for the woman who is being cheated on by the man who betrayed her as well. So while Sai may claim shes not gonna break Vinu and Ps family, really she's doing everything because she does not trust V to do right by her and the kids even now. She anticipates things getting worse than status quo. And so she's permanently putting a fullstop on V and Ps BS by making herself completely unavailable and getting hitched/pretending to be hitched to Satya.
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