Originally posted by The Hollywood Finochio:
Michael was purely concerned with 'when they come they will come at people you love' After the hit on Zaza Mike realized they were after blood and he didnt want his daughter in the firing line
Yeah I think that's Michael's main problem with it - he understands that Mary is already at least slightly endangered because of being his daughter, that forces trying to strike at Michael might try to get Mary instead, and if she hooks up with Vincent, with his outstanding talent for making enemies in a big hurry, this will become much worse.
As far as whether it's 'incest' or not, I think that does bug Michael somewhat but not that much. I don't know what the Catholic Church says, but marriage between first cousins actually is legal in like 42 U.S. states. So the whole thing is very borderline and probably creeps Michael out. But I think he is thinking more of the practical consequences.
