No. He’s the father of it because he instituted it in Massachusetts. All by himself, on his own authority, contrary to the Constitution and the laws.
That’s pretty far down the chain to be the ‘father’ of something - even if true. Let alone when you square it with the facts that the MA Supreme Court ordered gay marriage be implemented under the existing laws (Goodridge v. Department of Public Health). Maybe you’re suggesting that this was a choice for Romney (just as Obama believes it’s an executive’s choice to implement laws). Me, I’d rather live with a court’s bad decision and work to lawfully reverse it than arbitrarily implement law as one sees fit. I know a 5 min fact check exercise on FR is becoming less common and maybe even considered traitorous and rude - but what the hey - I’m ol’ fashioned.