I'm doubtful that Kay had an abortion. If she was trying to end "this Sicilian thing," logically she would also have to murder her first son, whose closest companions were all gangsters.

This would have made for a marvelous alternate ending: Kay induces Michael to serve as patron of the fledgling Reno Opera Society. For their gala premier, a performance of Cherubini's "Medea," Michael quietly arranges for Kay to sing the title role to rave reviews. He is quite surprised when, in the third act, Kay murders his children onstage to thunderous applause, as the audience all think that it's part of the show.