Same. Though, I think the story can use a bit more cleaning up. For me, it's mostly about how "the club" already existed before the infection happened, and how convenient this is for everything that's happening. Almost as if the wife had a hand in the virus and who it spread to. That it's so convenient makes it difficult for me to get immersed and just go with it, my suspension of disbelief gets broken.
In a way, I think it would've been better to go about it the reverse way. Have the wife have her kinks, planting the idea of incest in the minds of the MC and daughters. No mention of the club or any promises, but have the daughters escalate in ways that the MC doesn't know how to handle. Then, Jasmine could appear (with no previous connections to Tracy) who puts everything in context with the PGI explanation.
With the seed of incest already in the MC's mind, he'd be more open to medicate his daughters, and let them grow into their roles during the course of the story, instead of having them assigned by Tracy already.
This also avoids the issue with the MC just being along for the ride, giving him agency. This, for me, is another minor point in how the story is told right now. Whether it's him getting mind controlled or Tracy having arranged everything already... He's not controlling anything. In a way, this PGI strain has the reverse effect, where he seems like a slave to his emotions and bonds, while the women retain their free will.
My rantings aside, I am curious to see how the story develops.