I could see this rejection coming like watching two trains converging on the same
distant track. The clues about Vincenzo were there, but Cosmo was too oblivious to see them. Vincenzo was equally blind.
I find it funny they, Cosmo and Vincenzo, are like elementary school kids where the age difference of a year or so younger is like a chasm. Vincenzo calls Cosmo kid and Cosmo calls Marco kid.
Cosmo still hasn't escaped his past. He shoplifted a thimble, a silly and worthless thing, because he could. And now a physical connection to Cosmo's past is here when he's at his lowest and most vulnerable point and I think it's not unlikely he may have a concussion from the blow to the head.