Here's what I think happened...from what I've heard, Howard is fighting tooth and nail to keep the babies real father from being determined, going as far as keeping all of his cups he used during the hearings in his pocket so that DNA could not be taken off of them...so we know he's not the "real" father otherwise what's the point to keep his DNA from being taken.
He wants everything to stay in the Bahamas where the laws are very different than here....
Anyway..I think Anna had a relationship with her son and maybe it was his baby so he killed himself with a drug overdose since his mother was having his kid..I know its sick, but they were pretty strange.. Not just coincidence that it happened right after the baby was born... Then Anna couldn't live with what has transpired knowing she gave birth to her own son's kid, and overdodes herself, and now its Howard's job to keep any proof of this from coming to light...