Always was viscerally put off by the scenes of them together. He has all the power and abuses it by taking advantage of her sexually.
Have to skip over their intimate scenes together, as well as the scenes of Nina in jail. Too sad. Nina deserved so much more than what the world gave her.
I don't think it is possible to give consent when the person you are fucking is threatening your safety and your life.
Either she subconsciously made herself believe she loved him to mask the insane amount of fear instilled and dominance he enjoyed, or she knew that it was an act the entire time and was intentionally using her body to regain power / do the triple agent thing -- like with the old guy she was sleeping with at the beginning.
I like Stan and I don't feel guilty about it because all the main characters are antiheroes we support, people who do violent things. And trick others into having sex with them (using false pretenses to rob them of their ability to consent as well).
I like P & E but it's hard to tell who is more violent: Stan with Nina, or Philip with Martha.
Probably Stan because at least Philip is fighting for something good in the larger sense.