That also works with the naturalization record that was posted, and suanj's findings
On the Petition for Naturalization (which is dated 6 October 1909) Vito is unmarried.
He then takes his Oath of Allegiance on 25 March 1910, which is reflected in the 1910 date of naturalization on the 1920 census.
Try to confirm his address on the marriage record, and also with the naturalization record (Central Ave, Bklyn), as well as with the 1910 Census... to verify these are all the same person.
EDIT TO ADD***
The naturalization petition address is 153 Central Avenue, Bklyn
Here is a 1915 NYS Census for the family (Vito, wife listed as Marie - age difference agrees, children - May [Marie?]age 4. and Charles, age 2.
They are residing at 218 Suydam St., Bklyn - which is around the corner from 153 Central Ave.
Viter Dalessandro in the New York, State Census, 1915
Name: Viter Dalessandro
Birth Year: abt 1875
Birth Place: Italy
Age: 40
Gender: Male
Residence Place: New York, Kings
Relationship: Head
Color or Race: White
Number of Years in US: 15
Assembly District: 19
House Number: 218
Line Number: 14
Page Number: 02
Household Members:
Name Age
Viter Dalessandro 40
Marie Dalessandro 31
May Dalessandro 4
Charles Dalessandro 2
http://interactive.ancestry.com/2703/32 ... PUBJs=true
T.