How could this be a sequel ??
I have seen this movie a number of times and there was no implication at all about Serafine and the AWIL's David kessler . There was no direct mention of this totally in the movie !!! I replayed the whole thing and listened carefully to every word they utter but not a damn indication !!
If Serafine was really David Kessler's child , then her lycantrophy curse would not be broken even when Claude died . She would still be a Werewolf !!
But heck , when was it that the babies of Werewolves are also Werewolves themselves ? This is not Howling III or The Fly !!