I got the idea from the Alien film which I just saw a few days ago. The white fluid stops the infection and kills off any of the egg cells, so Sawk and Rook are fine. I haven't decided yet, but the unisex idea would probably be quite interesting.
Like all my stories, I'm going to limit this one to 20 chapters as well. You can definately expect a continuation to this story. I'm glad you liked this one so far, I'll try and bring some good ideas out for the next fanfics that I write
(Maybe a mudokon one?)