I believe that's not an "f" in preferenza, but a long 's'. Presenza. I believe it says that she died in the presence of Giacomo Buzzi, son of the deceased Francesco Buzzi, age 56, and Francesco Personico, son of the deceased Tomaso Personico, age 46.
These two (Giacomo Buzzi and Francesco Personico) both provide testimony at the end of the record.
But I saw no mention of marriage or spouses in the record. Take that with a grain of salt as I've already established I'm blind.