The first part is a comic named sexydoll geena is dead
Thing is, that is the first part of the Zombie Queen game, the one I'm looking for is the first part of the Zombie - The Transformation one, sorry, that's on me, should've specified.
The first part of this one is where they get a dead woman and resuscitate her as a zombie using zombie cum (or something), the second and third shows her hunting humans to consume their cum in order to become a human
I also distinctively remember that the first part was available as a demo on the late Christie's Room site, without needing to pay for the subscription