Dude chill i'm joking XD
And btw im not "complaing" im just pointing out my tough on the game... i'm not allowed to do ? and ffrom what i see my comments have starded an interesding debate about what the paople this of the sexual inclination of the characters in the game
In that case I apologize for misinterpreting your intent. As we all know tone can sometimes be difficult to pick up tone through text.
With that in mind my interpretation of Andras is that he has two sexual modes. First is "I'm horny, who is the most attractive person nearby with a soft hole?" In this mode all he really cares about is getting his rocks off and he doesn't want to work too hard for it. The second is domination mode, which of course is when he uses sex in order to assert his dominance over others.
As for how he relates to Alexia, I think his interest in her is primarily part of his attempts to dominate Rowan. Don't get me wrong I'm sure he finds her sexually attractive, but no more than any particularly attractive village girl. Alexia, apart from her connection to Rowan, simply isn't that special at this time. With a snap of his fingers he could send his orcs to raid a village and capture him a dozen of women just like her. Having sex with her is another way in which he can assert his dominance over Rowan, but he also can't just take her because they still need Rowans willing cooperation. But if he can woo her away from Rowan willingly then Andras can prove he is the "better man" and has a nasty surprise to reveal to Rowan at an appropriately devastating moment. It not that he is more into her than Rowan, rather she is a piece in his domination games against Rowan.
To jump back a moment to you initial question about meaningful relationships. Keep in mind that this isn't a game about building relationships, instead it is a game about corruption and whether you will succumb or resist. Even among the female characters there aren't many "meaningful" relationships to be found. Rowan and Alexia are the only good people in the castle (at least they are good at the start). Most of the castle's residents are evil, even the ones that are nice to you. And few that aren't outright evil are still at least indifferent towards evil. At least half of the named denizens are actively trying to control or dominate you in their own ways. So it likely isn't a great idea to form a romantic relationship with any of them. But then again...some of them are awfully tempting...