— Ashes rain from the eyes
The black abyss looks at us
There will be no other road further
If you go to hell, I will follow you
—Дождь из пепла льётся из глаз
Чёрная бездна смотрит на нас
Дальше не будет дороги другой
Если ты в пекло, я — за тобой
np: Би-2 - Пекло

SPOILERS
My review of the DLC about Vaas. I do not know English very well and could mistakenly translate some things, sorry:
Finished with Jonsy Vaas Insanity and the feeling is mixed. As with FarCry NewDawn, if I am asked about DLC with Vaas, I will spend two hours explaining what I liked and what caused my dissatisfaction. That’s what I’ll do now. First, I’ll tell you what I didn’t like, I’ll tell you my headcanons and what I liked.
And I didn’t like it .... VAAS IN LOVE WITH A SISTER. What is it, finally, what are you, Yubisoft, smoked together with Vaas? Let me explain why I don't like this incestuous turn of events.
After the game, I lay down for the night and realized that I still don't like the love affair between Vaasa and Citra so much that I cannot accept this canon. I've been in the fandom since 2015, and for far too many years I perceived their relationship as brotherly and that was the drama of their conflict.
And here we get Vaas with a flower in his hands, who, as a naive one, cannot write a love letter to Citra. It's crazy to go out of my mind, I have never seen such an OOC in the canon. This is very different from Vaas. Therefore, I ignore this turn of events.
I also missed Jason quite a bit. Yes, from the very beginning of the DLC announcement I said that I would like details in the relationship between Vaas and Citra (got it, fuck), but that didn’t mean that Jason would only shoot me and aggressively call me names.
He also lost some of his bakery. Because, despite the fact that he became a killing machine, I still always saw in him something of his former naive image, for which I also loved him. And then it was lost.
This is all happening in the minds of Vaas and I do not believe that Vaas did not imagine conversations with Jason in his head, even the most absurd ones. He spoke like that about their connection in the third part, both of them were fooled by Citra and both of them would no longer be able to live a normal life. That's why I love their dynamics. Therefore, in DLC I did not have enough chances with Jason.

Now on to the good and my heads.
Actually, in my headcanons, the relationship between Citra and Vaas developed exactly as we were shown, only without romantic love.
Vaas honors his family and is deeply attached to Citra. "Who the fuck are we without a family?" From childhood he does everything for the sake of his sister, and Citra, in turn, from childhood, manifests its essence and begins to break his mental state of Vaas, manipulates him. And when he grows up and sits down on drugs and piracy, then these factors, on top of that, make him a madman, coupled with his sister dripping on his nerves. Their opinions start to diverge early. Citra is conservative and tries to hammer Vaas into the Rakyat customs, and also make him his warrior, who will limply act according to her decree. I do not even deny that Citra really could have planned incest for the sake of the appearance of an heir, however, without that pretentious love that we were shown. Vaas is naturally against such an outcome, and at some point, his sister's ultimatum forces him to make a choice in favor of himself and piracy. "Who the fuck will you choose? Us or them?" - there was so much sincerity in this scream, because it was hard for Vaas to go against his sister. I think that being a pirate, he did not kill her, because no matter what, he remembers that she is his family. Perhaps even, as much as he would not want to kill Citra, he realizes that he will still follow her into the heat, if necessary. Only he will never obey.
In such a discord, some time passes and Jason gets into the drama of his sister and brother. And then we already know how Citra rebuilds its route to him and already brainwashes him, overwriting the warrior. Here I can already understand the active lustful inclinations of Citra to Jason and so on.
Vaas naturally sees this and realizes that she is just as trying to manipulate Jason as she once was. And that's why he compares himself to Jason, says that they are two sides of the same coin.
Here's a headkanon. Would write fanfic, I don’t know ..

I really like to hate Citra for her desire to make Vaas a weak-willed warrior and give birth to an ideal heir. And I really love to see how Vaas just drives him crazy and hurts, because he is very attached to Citra as a sister, and she gets up to such madness and puts him in front of a terrible choice.
And for some reason in the DLC they made Vaas in love, this cotton love letter and his jealousy of Citra for other men - I really didn’t like it, I really ignore it and headcanon what I like

I am madly in love with Far Cry. To see my favorite characters again was joyful, pleasant and warm to tears. And it was just as nice that my friends got to know them, I really appreciate it.
In general, I can say that I like a lot in DLC and I would like to fix a lot, as I have already described. Because it is a shame again, as in New Dawn, to ignore the canon because of its absurdity. I would like to love the whole game at once, and such a canon stumbling block as the Vaas / Citra pairing just sticks in and does not allow to accept the whole canon. Therefore, the headcanonss are my headcanons :_)