Leaving aside the incest thing it's just horribly written.
Every shot drawn with women in weird positions ends up being more sadly comical than sensual bc the author probably doesn't know shit about building up sexual tension, the sensuality is just not there XD
We're not even going to talk about the interactions between characters because we know it feels fake and it's just bad, the chemistry flew out the window.
Other pathetic part and the thing that ruins the story is how the women's clothes are ridiculously attached to their figures, undressing slowly is part of the "edging" and that ruins the expectation.
An extra thought: it's disappointing is how the feelings of guilt because of the "incest"(? are not even explored, they just go "oh no I know this is wrong but anyways", if the characters are doing something taboo at least make it feel like what they're doing is like grabbing a forbidden fruit, make their interactions outside of intercourse more complicated while they try to disguise their indecent secrets in front of others, like,,, at least make it interesting if you're gonna do weird porn troupes bruh
This became more of a lesson of writing porn for beginners rather than a review lol ╮( ̄▽ ̄)╭