That's your kink and that's fine. The simple answer is that Andras is a bad (Not exactly as in badly written, I won't get into that.)character and the least threatening of the twins.
I just think he and Jezera are dumb. And if Alexia isn't a literal bimbo, she wouldn't fall for Andras scheme and let him fuck her. The only time it makes sense is at the beginning of the game where she is kidnapped for literal months and her husband is imprisoned, so Andras tries to prey on her vulnerability. I just can't rationalize Alexia doing anything for him unless it was forced. Andras has no subtly and he quickly drops his mask of 'caring' about alexia frequently. Sure, she's just a peasant girl, but that doesn't/shouldn't make her blind to the situation. Her feelings of frustration at her situation are understandable. She has to sit back and be a hostage in a scary castle with dangerous and lewd people who would kill/rape/torture/brainwash/etc if they got the right to. While her husband is forced to serve them because they have her,He's gone for weeks at a time and she doesn't know when or if he'll even come back. She's stressed, lonely, and has no-one to trust. Not to mention that it's clear the things the twins make Roland do weigh on him, but he refuses to share so she can't even get some form of closure. It's neither of their faults and they are both trying to protect one another in their own way, which makes their relationship so interesting and worth investing in. Jezera makes sense, she at least tries to lure people into a sense of security before she pulls the rug out from under them.
Maybe It's just me, but I always tend to avoid the corruption/ntr stuff with Alexia because I see her as much more intelligence and resilient than the twins take into consideration. Like her husband, they underestimate her and see her as a easy target they can twist and make into another toy. But she isn't, she's loyal to her husband and while she can be frustrated with his actions because she's a thinking, feeling creature, she understands that he has to make tough decisions and is forced to do these things.
I can't respect or fear Andras because he has no charm or true intelligence. Sure, he shows that from time to time he isn't just a brute, but he always regresses to ooga bunga when push comes to shove. I wouldn't even call him a good fighter. He's like Wolverine but without any character to get you invested. He just tanks attacks because he relies on his body. He has;t earned his strength or his ego. He got a little bit of power and it went completely into his head and traveled down his dick. He has some bouts of him not being an asshole that I like, only because it's a break from all the mind-numbing, face-palm-inducing scenes he is in where he just has a tandem or fucks something up colossally and then shifts the blame to others. He's like homelander but without any traits you could actually like or enjoy about the character. At least Homelander is funny at times with his childishness. What makes homelander so scary is just how powerful he is, like he's the strongest character in series/show or at least one of them. Andras is overall just a bully and a stupid one at that. I don't care much for ntr, but this guy offers nothing other than fulfilling a kink. He's a literal detriment to his own goals.
I don't like Jezera either but again, not because of bad writing the game just does well to show you the antagonist's flaws. And whew boy is there a lot. What makes the great so great to me is that most of the twin's competent "Allies' know who is the real brain and threat behind the operation, Roland. The twins head's are just so far up their asses that they tend to forget that antagonizing the foundation that keeps the structure afloat is kinda bad? Like if roland was just a goon, i'd get it. But your entire plans for world conquest rely on him. Time and time again has shown that their other plans don't work because they don't see a bigger picture then being on top with no equals because they are the smartest, strongest, bestest people around. Have some damn self-reflection, Jesus.