So
LustSeekers maybe i'm missing something here but considering Anath is blatantly just as evil as her sister (literally the first thing she does is trying to murder and enslave humans to grow her own power, precisely the thing she is hypocritically condemning her sister for...) why is the MC helping her? Is he just supposed to be a psychopath that does not care what happens to humanity (and himself) as long as he can get laid? Is he supposed the be mind controlled? Anath might be claiming to do it for good reasons but he has no proof of that, while he does have proof of her being a murderous enslaving monster...
On a directly related note is becoming her pet/slave/"lover" (very heavy quotation marks on the last one) the only path or will there be an option to banish/destroy her or atleast turn the tables on her to make her the slave rather than the master? I can't say i have much desire to go down a unrealistic love route with her considering she tried to kill us and then threatened to kill us again unless we obey her...
I have not finished the game yet, i'm just Serenas first handjob (on that note Serana also seems to be strangely willing to help the literal demon for absolutely no reason?), so sorry if the second paragraph is answered already but the first question, why the MC trusts and tries to help the evil creature that literally just tried to murder him remains.
Edit: To offset the negativity of the rest of the post i should at least mention that i like the sex scenes and the characters seem good if you ignore the aforementioned "helping Anatah for no reason" issue. So it's not like i think this is a bad game as long as this major plot hole is fixed.