Woody Allen & Soon Yee

What is Woody Allen's relationship with Soon Yee's children? Father? Step-father? Grandfather? Step-grandfather? Half-grandfather? All of the above? None of the above. Divorce and remarriage makes family *** difficult enough to keep track of (I understand half-siblings and step-siblings, but never really understood how it would apply to grandparents, cousins, uncles & aunts, etc); but once incest is thrown in, things get really sloppy.
IS Woody Allen's relationship with Soon Yee really incest in the first place? If so, how does that change their relation to each other? For incest in general, exactly what is it called if you have sex with your mother and it produces a child? Are you the baby's father, half-brother, brother, or what? How does it all work once incest is involved?
Also, I guess even more common, some people have kids with a first or 2nd cousin, which isn't illegal, so would your child be your son/daughter, or would it be some type of cousin? How does all this work!
Another thing: what would MIA FARROW be considered. I think she's Soon Yee's step-mother and just Woody Allen's "wife" (or is there a more specific term?), right? So, what is she to Soon Yee's children: grandmother, step-grandmother, step-mother, mother, or what? Finally, who are Soon Yee's children's four grandparents?
One last question: does anyone think Soon Yee is actually Bun Mui in disguise?
Comments?