Thank you for the kind words, and especial thanks for thinking so much about the game and the relationships between characters. Having spent so long in their company, it really means a lot to know they have gone out into the world and affected other people too!
I purposely left a lot of blanks concerning how the main characters felt about one another, especially Viv and Sana, who both have reasons for keeping their cards close to their chests, but I’ll happily explain what I had in mind for them as I wrote.
Viv always had an intimate bond with the player. Even if you weren’t in a relationship with her, she was introduced as a very close friend in the first chapter. If you were in a relationship, then it’s implied that she was very much in love with you. It was perhaps a little mean, but I’ll confess that I really wanted that emotional punch of meeting her again when the years had distanced you and removed any chance of being together. So it’s intentionally bittersweet - yes, she adores you but to her you’re a romantic echo from the past, a reminder of the days when she was young and carefree. She does love you but she also loves Malik, with whom she has built a life, raised a family and shared decades of joys and sorrows.
Malik himself is a favourite of mine, even though I didn’t end up giving him that much time in the game. He’s a thoughtful and quietly principled man who accepts a marriage to Viv (that he initially doesn’t want) solely to protect her and refuses to take advantage of her position even as he finds himself falling in love with her. He is prepared to listen to her and to believe her, then to transcend the views of his time and defer to her.
I wish now that I’d spent some time outlining the relationship between Malik and Sana - that’s really an excellent point - but the fact they don’t mention one another is also telling of the way I saw their relationship. When Sana was taken and essentially brainwashed by the Old Man of the Mountain, Malik devoted everything he had to getting her back (as Viv will tell you in at least some possible routes) and it’s implied that he blames himself for not having managed to do it sooner. Alongside his guilt, I also felt that a part of Sana did blame him for the same reason…
So there’s an unspoken shame between them. There’s also, now, a gulf in their views of the world. Malik values peace at all costs whereas Sana believes that only violence has the power to force change. I think that’s why I didn’t have them speak much to one another - sad as it is, I felt they had little more to say…
When you first meet Sana in the game, she’s horribly broken. She’s been conditioned to kill and has killed. She’s been lied to and betrayed so much that she’s no longer prepared to trust or like anyone. But… she feels differently about you. When she was a young girl, her mother told her stories about you. You were the astronaut, the true friend, an almost legendary figure from an impossible world. So, you’re her way back to the values of her childhood. Beneath the hurt and the ferocity, she’s a caring and genuine person, just as her mother hoped she would be, but she can’t get there on her own. As for how she feels about you having dated her mother, to my mind that was never really weird for her in the way it was for Viv - she’s too intensely practical for considerations like that.
Hope that helps to answer at least some of your questions. Thanks again for asking them!
(BTW new game is already underway here: https://forum.choiceofgames.com/t/bitten-now-with-actual-synopsis)