There are multiple ways to look at it... just put yourself in her shoes. If you see someone you live with beating a person to death, after you have seen them sneaking out at the dead of the night with a loaded gun, right in front of you and you know you may make a difference .. may be able to stop him from doing so.. won't you try to stop him? Raja is the only person she knows in the household. And she knows Raja can be ready to kill anyone for the smallest of reasons.. that day he was going to kill those goons just because they touched her.. she stopped him that day as well na? And he did stop... She did the same here... she acted on her reflex...
It is also because of the fact that she may call him jungli.. insensitive... idiot... janwar.. and what not.. but he is still her husband.. she begs him to leave her.. let her go... she really wants to go.. but she knows till the time she is living with him.. till the time he lets her go.. they are husband and wife... that's why she puts on sindoor.. that is why that day she obeyed Raja when he asked her not to tell anyone that he left her a note... she even took up that test but never disobeyed him... that's why she put the pallu (better late than never..) ... when she was rushing to stop Raja...
You may also say she cares for him deep down as well.. remember she called him "Raju" in her monologue after she finished reading his note... she does run to him when in trouble (the snake scene).. she has a bond with him deep down..
It was very much in her character... and it was not something incomprehensible. You see where she is coming from.. that day when Raju was beating AK.. she was rooting to beat the man up because AK abused Raju .. mistreated him as a mentally challenged person.. and slapped JM thinking there is no one to stand up for her... she was rooting for her husband to beat him up... not to kill him.. otherwise she wouldn't have felt disgusted when he killed him without any trace of remorse! She is shook up after AK's murder... she hasn't really got over it! Also it was Raju... who was not capable of hurting anyone severely.. and this is Raja who has the tendency to kill anyone when angry.. big difference there. And anyway as I said even the situation was very different from this...
About Bhanu .. why she didn't say anything... well there is a difference between humiliating someone and beating someone to death! She did feel uncomfortable at that point but she was seconds before insulted in front of the entire clan herself.. who was actually cheering for Bhanu when he was misbehaving with her... here it shows clearly that she is not mahaan! You cannot put that tag on her! She is humane! A good person yes... but not mahaan!
Didn't she voice her disgust when Dauji was torturing that widow? She did na? That's exactly who she is! She cannot stand violence! That is why she is so misfit in Raja's world! She hasn't even slapped anyone till date! It is in her character to abhor violence... And Raja ko sirf gun ki boli ati hai .. as he said..And that is why she calls him jungli only.. because of his love for violence and chauvinistic ways!
Though she is wrong here.. because that is all she sees in him.. it happens na.. when you dislike someone you dislike everything about them.. so she doesn't see his love.. she is insensitive to his feelings at this point.. but so is he... he protects her.. loves her.. but he doesn't really understand or connect with her emotionally... he thought by humiliating Bhanu in the party he cleared the matter once and for all.. he doesn't see that till then the damage was done.. she was already humiliated and hurt publicly... he only balanced it out by humiliating Bhanu.. he didn't erase her pain.. he comes and drools on her.. trying to get close to her... so she thinks his love is shallow... obviously there is a disconnect between the two emotionally.. they are at two very different places.. it is necessary.. though it won't be easy for them to find a middle ground..
I am just explaining you JM's point of view as you asked about her, not talking about Raja's POV. I see both JM's and Raja's POVs... and I seriously cannot love them both enough! They are so humane, real and flawed! I love how the characters are developing this season!
Sorry reply got long... 😕😳
P.S. Copied/pasted from my comment on Chakku's post...😆