I don't think Sai is justifying it.
I do think that she is recognizing that V is capable of losing control but she focuses right now due to circumstances on only his positives, his hurt/pain amd wants to placate him. But that does not mean she is justifying him being violent or locking her. She will retaliate if he does anything wrong just like she has before. Shes not going to bow down an accept it.
Exactly this is what I am talking about. EVen for placating him , I cant imagine the Sai who questioned manhandling saying all this. Its not funny when they make her funnily say, mujhe lock kar denge, just in order to placate him.
This is why I say in her mind, she has normalized it. She may or may not retaliate, depending on her sehensheelta.. But then again the sehensheelta has been broadened, now. Daayre badh gaye hain. Sehensheelta ki hadd badh gayi hai.
In one year she has reached this stage of wanting to step out of the house at any sign of abuse, to choosing between which abuse to fight against.